The ZFrac1/2, ZFrac1/3, ZFrac 1/4, ZFrac1/5, ZFrac 1/8, and ZFrac1/10 zoom commands enable you to trace graphs on your TI-84 Plus calculator by fraction steps.

**ZFrac1/2 zoom command on the TI-84 Plus:**This command graphs your function in a preset viewing window whereIt is accessed by pressing [ZOOM][ALPHA][APPS], or by pressing [ZOOM] and using the up-arrow key to scroll to

**ZFrac1/2**.When you trace a function graphed in a

**ZFrac1/2**window, the x-coordinate of the Trace cursor will be a multiple of 1/2.**The TI-84 Plus calculator's ZFrac1/3, ZFrac 1/4, ZFrac1/5, ZFrac 1/8, and ZFrac1/10 commands:**These commands graph your function in a preset viewing window and work in the same manner as**ZFrac1/2**does. If you think of*d*as the denominator of your fraction, then the viewing window isTracing with these commands enables you to trace the x-coordinates by multiples of 1/d.