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What is the value of r if the line that passes through ( 4,3 ) and ( -5,r ) has a slope of -1

What is the value of r if the line that passes through ( 4,3 ) and ( -5,r ) has a slope of -1
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1 vote
What is the value of r if the line that passes through ( 4,3 ) and ( -5,r ) has a slope of -1

User Mariya Steksova
by
8.2k points

1 Answer

6 votes

Answer:

r= 12

Explanation:

Slope=
(y1 - y2)/(x1 - x2)

Using the formula above,


(r - 3)/( - 5 - 4) = - 1 \\ (r - 3)/( - 9) = - 1 \\ r - 3 = - 1( - 9) \\ r - 3 = 9 \\ r = 9 + 3 \\ r = 12

User JoeyJubb
by
7.8k points
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