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anonymous
 4 years ago
PLEASE HELP!
What is the y coordinate of the y−intercept of the line that passes through the points
(−4, −1) and (4, 5)?
anonymous
 4 years ago
PLEASE HELP! What is the y coordinate of the y−intercept of the line that passes through the points (−4, −1) and (4, 5)?

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anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0Okay first you need to calculate the equation of the line, for that you need the gradient of the line passing through the two points. \[m = (y _{2}  y_{1}) \div (x _{2}  x_{1})\] where m is the gradient. Using this, you can select any of the points and compute gradient. The gradient is, m = 3/4 Now you use the general form of a linear equation to find the equation of the line: \[y  y_{1} = m(x  x_{1})\] You leave x and y as they are and select ONE of the point sets to be x1 and y1 Hence you get y5 = 0.75(x4) y5 = 0.75x  3 y = 0.75x + 2 Remember, on the y axis, x=0 So the yintercept is 2

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0IM SO GRATEFUL ! THANK YOU SO MUCH! :D
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