### Home > PC3 > Chapter 10 > Lesson 10.2.2 > Problem 10-137

Write an equation for a function that represents your graph.

Sketch the situation. Identify the amplitude, period, and any shifting.

Jack feels that the best position for the pedal to start riding is when the pedal is at

inches and heading downward. What is the first time the pedal will be in this position? Set your equation from part (a) equal to

and solve.

Use the eTool below to see a sample animation.

Click the link to the right for full version. 10-137 HW eTool