SOLUTION: Find the slope of the line passing through the points (4,8) and (8,7).

Algebra ->  Linear-equations -> SOLUTION: Find the slope of the line passing through the points (4,8) and (8,7).      Log On


   

Question 510948:

Find the slope of the line passing through the points (4,8) and (8,7).
Answer by oberobic(2304) About Me  (Show Source):
You can put this solution on YOUR website!
m = slope
.
m = change in y / change in x
.
m = (8-7) / (4-8)
.
m = 1/-4
.
m = -1/4
.
y = -1/4x + b
.
Use one of the points to find 'b'
.
(4,8)
.
8 = -1/4(4) + b
.
8 = -1 + b
.
b = 9
.
graph%28500%2C500%2C-20%2C20%2C-20%2C20%2C-1%2F4%2Ax%2B9%29