Asked by Hannah

y-intercept is -3 and passing through (3,-7) what is the equation?
Answered by Reiny
start with
y = mx + b
you know b = -3, it is given
so y = mx -3
you also are given the point (3,-7), so
-7 = 3m - 3
3m = -4
m = -4/3

y = (-4/3)x - 3
Answered by Hannah
Thank you for explaining!
Answered by oobleck
y-intercept is -3 and passing through (3,-7) what is the equation
You now have two points on the line: (0,-3) and (3,-7)
so, the slope is -4/3
Now you have a point and a slope, so using the point-slope form of the line,
y+3 = -4/3 (x-0)
as above
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