SOLUTION: find the value of A if the line joining the points A (a,-2) and B(-6,1) has a slope of -3

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Question 771860: find the value of A if the line joining the points A (a,-2) and B(-6,1) has a slope of -3
Answer by oscargut(2103) About Me  (Show Source):
You can put this solution on YOUR website!
slope = (1+2)/(-6-a)= -3
3 = -3(-6-a)
3 = 18+3a
3a = -15
a = -5
I can help you with more questions at: mthman@gmail.com
Thanks