SOLUTION: A straight line passes through (4,5)and (-4,1) find the gradient of the line and the y-intercept of the line.

Algebra ->  Points-lines-and-rays -> SOLUTION: A straight line passes through (4,5)and (-4,1) find the gradient of the line and the y-intercept of the line.      Log On


   

Question 897439: A straight line passes through (4,5)and (-4,1) find the gradient of the line and the y-intercept of the line.
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
Gradient or slope:
m=%28y%5B2%5D-y%5B1%5D%29%2F%28x%5B2%5D-x%5B1%5D%29
m=%281-5%29%2F%28-4-4%29=-4%2F-8=1%2F2
Using the point-slope form,
y-5=%281%2F2%29%28x-4%29
y-5=%281%2F2%29x-2
y=%281%2F2%29x%2B3
.
.
m=1%2F2
.
.
b=3
.
.