
First find the slope of the line.
\
(Substitute 7 for x1,
2 for y1,
4 for x2 and
2 for y2)
(Product of two same signs is positive)
(Apply additive inverse property:
)
(Subtract:
)
(Divide:
) \ \
Next find the y-intercept value by replacing m with 0, y with
2 and x with 7
in the equation
.

(Apply zero property of multiplication: a
0 = 0)
(Apply additive identity property: a + 0 = a)
Replace m with 0 and b with
2 in the slope-intercept form line equation
.

(Apply zero product property: a
0 = 0)
The slope-intercept form line equation is
.