SOLUTION: What would she have gotten for the equation of the linear function if she had used the ordered pairs (2, 5) and (4, 1) instead?

Question 1084685: What would she have gotten for the equation of the linear function if she had used the ordered pairs (2, 5) and (4, 1) instead?
Answer by Cromlix(4381) (Show Source): You can put this solution on YOUR website!
Hi there,
Using the ordered pairs (2, 5) and (4, 1)
Gradient = y2 - y1/x2 - x1 = 1 - 5/4 - 2 = -4/2 = -2
Using gradient = -2 and (4, 1)
y - b = m(x - a)
y - 1 = -2(x - 4)
y - 1 = -2x + 8
y = -2x + 8 + 1
y = -2x + 9
Hope this helps :-)
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