Observe the graph; the line is passing through origin (0, 0) and (2.5, 2).

The line equation in slope-intercept form is , where m is the slope and b is the y-intercept.

First find the slope (m).

The slope formula is .

              (Replace with 0, 0, 2.5 and 2)

              (Apply additive identity property: )

                   (Apply additive identity property: )

                      (Find the value using a calculator: )

Next find the y-intercept (b).

                 (Substitute for m)

              (Substitute 0, 0 for x and y)

                             (Apply zero product property: )

Substitute 0.8 for m and 0 for b in the Slope-intercept form equation

The line equation in slope-intercept form is .