SOLUTION: determine the slope of the line tht passes through each pair (2,1), (8,9)

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Question 538072: determine the slope of the line tht passes through each pair
(2,1), (8,9)
Found 2 solutions by mananth, oberobic:
Answer by mananth(16946) About Me  (Show Source):
You can put this solution on YOUR website!
x1 y1 x2 y2
2 1 8 9

slope m = (y2-y1)/(x2-x1)
( 9 - 1 )/( 8 - 2 )
( 8 / 6 )
m= 4/ 3

Answer by oberobic(2304) About Me  (Show Source):
You can put this solution on YOUR website!
y = mx + b is the slope-intercept form.
.
m = change in y / change in x
m = (1-9) / (2-8)
m = -8 /-6
m = 8/6
m = 4/3
.
y = 4/3x + b
.
Use one of the points to find 'b'.
.
1 = 4/3(2) + b
1 = 8/3 + b
1 -8/3 = b
3/3 -8/3 = -5/3 = b
.
y = 4/3*x -5/3
.
+graph%28500%2C500%2C-5%2C5%2C-5%2C5%2C4%2F3%2Ax-5%2F3%29+