Question

Writing the Equation of a Graph
A graph has month on the x-axis and saved (money) on the y-axis. Points are at (0, 3,000), (2, 2,450), and (5, 1,625).

The instructor’s friend also plans to rent an apartment in the same complex. Use the graph to identify the y-intercept and the slope used to write the equation in slope intercept form.

y-intercept =

Slope =

Linear equation =

Answer 1

y-intercept = 3000

Slope = (2450 − 3000)/(2 − 0) = −550/2 = −275 (dollars per month)

Linear equation = y = −275x + 3000