SOLUTION: Y=5/3x-9 on a graph

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Question 1155468: Y=5/3x-9 on a graph

Answer by Theo(13342) About Me  (Show Source):
You can put this solution on YOUR website!
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x-intercept is value of x when y = 0 and occurs at x = 15.

y-intercept is value of y when x = - and occurs at y = -9.

slope is (y2 - y1) / (x2 - x1).
let (x1,y1) = (0,-9)
let (x2,y2) = (50,21)
(y2-y1) = 21 - (-9) = 21 + 9 = 30
(x2-x1) = 50 - 0 = 50
(y2-y1) / (x2-x1) = 30 / 50 = 3/5

slope intercept form of equation is y = mx + b
m is the slope (equal to 3/5).
b is the y-intercept (equal to -9).