Question

Max rides his scooter toward Kim and then passes her at a constant speed. His distance in feet, d, from Kim t seconds after he started riding his scooter is given by d = |150 – 9t|. What does the 150 in the equation represent? What does the 9 in the equation represent?

Answer 1

What does the 150 in the equation represent?
Max's starting distance from Kim

What does the 9 in the equation represent?
Max's constant speed

Answer 2

The equation of
`d=|150-9t|` represents the distance from Max to Kim.

If you look at the equation, you can say that each second, 9 feet is being lessened from 150. So that means Kim is initially 150 feet ahead of Max and he is closing in at 9 meters per second.

• 150 in the equation represents the initial distance between Max and Kim. 150 is how far Max is from Kim before he starts.
• 9 in the equation represents the rate at which Max is closing in on Kim. 9 feet per second is Max's rate.

ANSWER:

150 represents the distance Max is from Kim

9 represents that rate at which Max is riding his scooter (9 feet per second)