Atruck driver earns a daily amount based on the number of miles he drives on monday here and $70 for driving 120 miles and on tuesday he earns $102.50 for driving to 50 miles explain how to derive a linear function that expresses the daily amount she earns fir driving x miles that day show your work and intercept the rate of change and initial value of the function.

Let x represent miles and y represent dollars.
That gives you coordinates (120, 70) and (50, 102.5).
First, find the slope (m) of the line using
m =
    = =
Note: slope is rate of change.

Next, use the Point-Slope formula and solve for y:
y - = m (x - )
y - 70 = (x - 120)
y - 70 = x +
      y  = x +


linear function is: y  = x +
rate of change is:
initial value of the function:

The unit price is 0.99