{"appState":{"pageLoadApiCallsStatus":true},"articleState":{"article":{"headers":{"creationTime":"2017-01-28T04:03:49+00:00","modifiedTime":"2017-01-28T04:03:49+00:00","timestamp":"2022-09-14T18:17:10+00:00"},"data":{"breadcrumbs":[{"name":"Academics & The Arts","_links":{"self":"https://dummies-api.dummies.com/v2/categories/33662"},"slug":"academics-the-arts","categoryId":33662},{"name":"Study Skills & Test Prep","_links":{"self":"https://dummies-api.dummies.com/v2/categories/33772"},"slug":"study-skills-test-prep","categoryId":33772},{"name":"SAT","_links":{"self":"https://dummies-api.dummies.com/v2/categories/33794"},"slug":"sat","categoryId":33794}],"title":"SAT Math Word Problems: Functions","strippedTitle":"sat math word problems: functions","slug":"sat-math-word-problems-functions","canonicalUrl":"","seo":{"metaDescription":"The SAT Math exam contains word problems that require you to be familiar with functions. Some questions, like the first practice question, will be a simple matt","noIndex":0,"noFollow":0},"content":"The SAT Math exam contains word problems that require you to be familiar with functions. Some questions, like the first practice question, will be a simple matter of plugging in a number. Others, like the second practice question, may be trickier than they appear.\r\n<h2 id=\"tab1\" >Practice questions</h2>\r\n<ol>\r\n\t<li>This equation is a model of projected fish population at a lake, where <em>w</em> represents the number of weeks and <em>f</em>(<em>w</em>) represents the approximate number of fish. According to the model, what is the projected number of fish at the end of the 24th week?\r\n<a href=\"https://www.dummies.com/wp-content/uploads/SAT1001_2401.gif\"><img class=\"alignnone size-full wp-image-232812\" src=\"https://www.dummies.com/wp-content/uploads/SAT1001_2401.gif\" alt=\"SAT1001_eq2401\" width=\"163\" height=\"55\" /></a>\r\n<strong>A.</strong> 11\r\n<strong>B.</strong> 122\r\n<strong>C.</strong> 131\r\n<strong>D.</strong> 181</li>\r\n\t<li>The function <em>f</em> is defined by a polynomial. Some values of <em>x</em> and <em>f</em>(<em>x</em>) are shown in the table.\r\n<a href=\"https://www.dummies.com/wp-content/uploads/SAT1001-0024-01.gif\"><img class=\"alignnone wp-image-232816 size-full\" src=\"https://www.dummies.com/wp-content/uploads/SAT1001-0024-01.gif\" alt=\"SAT1001-function\" width=\"155\" height=\"276\" /></a>\r\nWhat is the value of\r\n<a href=\"https://www.dummies.com/wp-content/uploads/SAT1001_2402.gif\"><img class=\"alignnone size-full wp-image-232813\" src=\"https://www.dummies.com/wp-content/uploads/SAT1001_2402.gif\" alt=\"SAT1001_eq2402\" width=\"67\" height=\"59\" /></a></li>\r\n</ol>\r\n<h2 id=\"tab2\" >Answers and explanations</h2>\r\n<ol>\r\n\t<li><strong>The correct answer is Choice (D).</strong>\r\nPlug 24 in for <em>w</em> and simplify the equation:\r\n<a href=\"https://www.dummies.com/wp-content/uploads/SAT1001_2403.gif\"><img class=\"alignnone size-medium wp-image-232814\" src=\"https://www.dummies.com/wp-content/uploads/SAT1001_2403-173x255.gif\" alt=\"SAT1001_eq2403\" width=\"173\" height=\"255\" /></a></li>\r\n\t<li><strong>The correct answer is 6.</strong>\r\nAccording to the table, <em>f</em>(5) = 6. Therefore,\r\n<a href=\"https://www.dummies.com/wp-content/uploads/SAT1001_2404.gif\"><img class=\"alignnone size-full wp-image-232815\" src=\"https://www.dummies.com/wp-content/uploads/SAT1001_2404.gif\" alt=\"SAT1001_eq2404\" width=\"168\" height=\"59\" /></a></li>\r\n</ol>","description":"The SAT Math exam contains word problems that require you to be familiar with functions. Some questions, like the first practice question, will be a simple matter of plugging in a number. Others, like the second practice question, may be trickier than they appear.\r\n<h2 id=\"tab1\" >Practice questions</h2>\r\n<ol>\r\n\t<li>This equation is a model of projected fish population at a lake, where <em>w</em> represents the number of weeks and <em>f</em>(<em>w</em>) represents the approximate number of fish. According to the model, what is the projected number of fish at the end of the 24th week?\r\n<a href=\"https://www.dummies.com/wp-content/uploads/SAT1001_2401.gif\"><img class=\"alignnone size-full wp-image-232812\" src=\"https://www.dummies.com/wp-content/uploads/SAT1001_2401.gif\" alt=\"SAT1001_eq2401\" width=\"163\" height=\"55\" /></a>\r\n<strong>A.</strong> 11\r\n<strong>B.</strong> 122\r\n<strong>C.</strong> 131\r\n<strong>D.</strong> 181</li>\r\n\t<li>The function <em>f</em> is defined by a polynomial. Some values of <em>x</em> and <em>f</em>(<em>x</em>) are shown in the table.\r\n<a href=\"https://www.dummies.com/wp-content/uploads/SAT1001-0024-01.gif\"><img class=\"alignnone wp-image-232816 size-full\" src=\"https://www.dummies.com/wp-content/uploads/SAT1001-0024-01.gif\" alt=\"SAT1001-function\" width=\"155\" height=\"276\" /></a>\r\nWhat is the value of\r\n<a href=\"https://www.dummies.com/wp-content/uploads/SAT1001_2402.gif\"><img class=\"alignnone size-full wp-image-232813\" src=\"https://www.dummies.com/wp-content/uploads/SAT1001_2402.gif\" alt=\"SAT1001_eq2402\" width=\"67\" height=\"59\" /></a></li>\r\n</ol>\r\n<h2 id=\"tab2\" >Answers and explanations</h2>\r\n<ol>\r\n\t<li><strong>The correct answer is Choice (D).</strong>\r\nPlug 24 in for <em>w</em> and simplify the equation:\r\n<a href=\"https://www.dummies.com/wp-content/uploads/SAT1001_2403.gif\"><img class=\"alignnone size-medium wp-image-232814\" src=\"https://www.dummies.com/wp-content/uploads/SAT1001_2403-173x255.gif\" alt=\"SAT1001_eq2403\" width=\"173\" height=\"255\" /></a></li>\r\n\t<li><strong>The correct answer is 6.</strong>\r\nAccording to the table, <em>f</em>(5) = 6. Therefore,\r\n<a href=\"https://www.dummies.com/wp-content/uploads/SAT1001_2404.gif\"><img class=\"alignnone size-full wp-image-232815\" src=\"https://www.dummies.com/wp-content/uploads/SAT1001_2404.gif\" alt=\"SAT1001_eq2404\" width=\"168\" height=\"59\" /></a></li>\r\n</ol>","blurb":"","authors":[{"authorId":8978,"name":"Ron Woldoff","slug":"ron-woldoff","description":" <p><b>Ron Woldoff is founder of National Test Prep, where he helps students succeed on the GMAT, GRE, SAT, ACT, and PSAT. 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SAT Math Word Problems: Functions

By: Ron Woldoff and

Updated: 01-28-2017

From The Book: SAT

SAT

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The SAT Math exam contains word problems that require you to be familiar with functions. Some questions, like the first practice question, will be a simple matter of plugging in a number. Others, like the second practice question, may be trickier than they appear.

Practice questions

This equation is a model of projected fish population at a lake, where w represents the number of weeks and f(w) represents the approximate number of fish. According to the model, what is the projected number of fish at the end of the 24th week?
A. 11 B. 122 C. 131 D. 181
The function f is defined by a polynomial. Some values of x and f(x) are shown in the table.
What is the value of

Answers and explanations

The correct answer is Choice (D). Plug 24 in for w and simplify the equation:
The correct answer is 6. According to the table, f(5) = 6. Therefore,

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Ron Woldoff is the founder of National Test Prep, where he helps students prepare for the SAT, GMAT, and GRE. He is the author of several books, including GRE For Dummies and 1,001 GRE Practice Questions For Dummies.

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