Question

Dudley is biking. He wants to cover 40 miles. If he travels 30 miles every 2 hours, what is the equation of a line that models y, the number of miles he has left to travel, after biking x hours?

ANSWERS
y = -15x – 40
y = -30x + 40
y = -15x + 40
y = 30x – 40

Answer 1

y = -15x+40 is the answer

Answer 2

Option C.

Explanation:

Dudley is biking and wants to cover 40 miles.

If he travels 30 miles in 2 hours and y is the distance left to travel then we have to write an equation for this situation.

Biker travels distance in 2 hours = 30 miles

Then he travels in x hours =
`(30)/(2)` × (x) miles

= 15x miles.

So distance remaining to cover = ( 40 - 15x ) miles.

or y = -15x + 40

Therefore, Option C will be the answer.