Question

Find the constant rate of change​

Answer 1

- 2 ft/ s

Explanation:

The rate of change is the slope m of the line.

Calculate m using the slope formula

m =
`(y_(2)-y_(1) )/(x_(2)-x_(1) )`

with (x₁, y₁ ) = (0, 80) and (x₂, y₂ ) = (40, 0) ← 2 points on the line

m =
`(0-80)/(40-0)` =
`(-80)/(40)` = - 2

Rate of change is - 2 ft/ s