Mihret G.
asked 09/01/20Write the equation of a line that passes through point (8,-6) and (0,6)
3 Answers By Expert Tutors
Mark M. answered 09/02/20
Mathematics Teacher - NCLB Highly Qualified
Use the two-point form:
(y + 6) / (x - 8) = (-6 - 6) / (8 - 0)
(y + 6) / (x - 8) = -12 / 8
(y + 6) / (x - 8) = -1.5
y + 6 = -1.5x + 12
y = -1.5x + 6
You will need to find the equation of the line in slope intercept form y=mx+b.
First, find the slope m using slope formula m = (y_2-y_1)/(x_2-x_1) which is m=(6-(-6))/(0-8)=-12/8=-3/2
Now that you found the slope, your equation intercept form looks like y=-3/2 x+b.
Both points (8, -6) and (0.6) belong to this line, therefore both points coordinates satisfy line above which means: 6=-3/2(0)+b (i used second point here)
Solving for b we will get y intercept which is b=6
Finally, the line that passes through points (8,-6) and (0,6) has equation: y=-3/2 x + 6
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