The slope-intercept form is y = mx + b
7 = m*3 + b
3 = m*9 + b
Subtract second equation from the first, to eliminate the unknown b.
4 = -6m
m = -2/3
7 = -2 + b
b = 9
y = -(2/3)x + 9
Write the slope-intercept equation for the line through (3, 7) and (9, 3)
1 answer