Question

A scuba diver at a depth of 80 ft begins her ascent to the ocean surface. Her rate of change in depth is 2 ft/s. Which equation represents her depth in feet t seconds after she begins her ascent?

Answer 1

c

Explanation:

Answer 2

Explanation:

The rate of change of depth is given as 2 ft/s which is constant.

Let depth be represented by y.

At time t = 0, depth is -80 feet.

At any given time t, depth will be y.

Hence, rate of change of depth can be written as:

`(y-y_(0) )/(t-t_(0) ) = 2`

`(y-(-80))/(t)=2`

∴y = 2*t - 80

This equation describes her depth when she begins her ascent