Question 540146: Write the equation of a line in slope intercept form that goes through the points (1/2,1/5) and (-3/4,5/8). Would y=.425/-1.25x+.37 work?
Answer by Alan3354(69443)   (Show Source):
You can put this solution on YOUR website! Write the equation of a line in slope intercept form that goes through the points (1/2,1/5) and (-3/4,5/8).
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y=.425/-1.25x+.37
--> y = -0.85x + 0.37
Sub for x & y, see if they work
(1/2,1/5) --? 0.2 = -0.85*0.5 + 0.37
0.625 = 0.37 no good
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(1/2,1/5) and (-3/4,5/8)
slope m = diffy/diffx = (0.625 - 0.2)/(-0.75 - 0.5)
m = -0.34
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Use y = mx + b and either point to find b
0.2 = -0.34*0.5 + b
b = 0.37
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y = -0.34x + 0.37
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