## Practice Questions

A doctor measured the blood sugar levels of one of her patients shortly after giving the patient a candy bar to eat. The following graph shows the patient's blood sugar level (*y*),

*x*hours after she ate the candy bar.

- How long after eating the candy bar was the patient's blood sugar level the highest?
**A.**20 minutes**B.**30 minutes**C.**40 minutes**D.**1 hour*The next question is based on the following graph.* - What is the product of
*A*times*C*times*D*times*E?***A.**–126**B.**0**C.**63**D.**126

## Answers and Explanations

- The correct answer is C.
According to the graph, the patient's blood sugar began to increase immediately after she ate the candy bar and reached a peak after 2/3 of an hour (40 minutes) before falling again. Hence, Choice (C) is correct.

- The correct answer is B.
From the line graph, you can see that

*A*= –9,*C*= 7,*D*= 0, and*E*= –2. Therefore,*A*times*C*times*D*times*E*equals (–9)(7)(0)(–2). Multiplying any number by zero equals zero, so Choice (B) is the correct answer.