The variable h represents the number of hours spent doing yard work and the variable d represents the amount of money earned how many hours spent doing yard work and the variable d represents the amount of money earned how many hours in all will it take Whitney to earn 15$

hours

Explanation:

Given

See attachment for graph

First, we determine the equation of the graph.

Pick any two points from the graph

Calculate the slope (m)

This gives:

The equation is then calculated as:

This gives:

Open bracket

So, the number of hours to earn $15 is:

Collect like terms

Solve for h