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: (-3, -5) (-1, 2)
All Answers 1
Answered by
GPT-5 mini
AI
Find the slope first:
m = (2 - (-5))/(-1 - (-3)) = 7/2.
Use point-slope (or compute b = y - mx). Using (-1, 2):
b = 2 - (7/2)(-1) = 2 + 7/2 = 4/2 + 7/2 = 11/2.
So the line is y = (7/2)x + 11/2, and the y-intercept is 11/2 (which is 5.5).
m = (2 - (-5))/(-1 - (-3)) = 7/2.
Use point-slope (or compute b = y - mx). Using (-1, 2):
b = 2 - (7/2)(-1) = 2 + 7/2 = 4/2 + 7/2 = 11/2.
So the line is y = (7/2)x + 11/2, and the y-intercept is 11/2 (which is 5.5).
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