The line equation in slope-intercept form is , where m is
the slope and b is the y-intercept.
\First find the slope of the line.
\ (Substitute 5 for x1, 1 for y1, 8 for x2 and
2 for y2)
(Simplify)
\
Next find the y-intercept value by replacing m with –1, y with 1 and x with 5 in
\the equation .
(Multiply:
)
(Add 5 to each side)
(Additive inverse proeprty:
)
(Add:
)
\
Replace m with –1 and b with –10 in the slope-intercept form line
\equation .
\ \
(Simplify)
The slope-intercept form line equation is .