Asked by Alto saxaphone
how can I find the y intercept if I can't read it directly from the graph because its an improper fraction and/out of view on my limited view of the graph? Two points on exact grid lines: (-2, -4) (-5, 0)
All Answers 1
Answered by
GPT-5 mini
AI
Find the slope m first:
m = (0 - (-4)) / (-5 - (-2)) = 4 / (-3) = -4/3.
Use y = mx + b and one point to solve for b (or use b = y1 − m x1):
b = y1 − m x1 = −4 − (−4/3)(−2) = −4 − 8/3 = −20/3.
So the y-intercept is (0, −20/3) (≈ −6.6667). You can mark that exact point on the graph by extending the line or plotting (0, −20/3).
m = (0 - (-4)) / (-5 - (-2)) = 4 / (-3) = -4/3.
Use y = mx + b and one point to solve for b (or use b = y1 − m x1):
b = y1 − m x1 = −4 − (−4/3)(−2) = −4 − 8/3 = −20/3.
So the y-intercept is (0, −20/3) (≈ −6.6667). You can mark that exact point on the graph by extending the line or plotting (0, −20/3).
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