SOLUTION: Find the value of R so the line passes through (9,13) an (5,R) has a slope of m=1/2

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Question 611685: Find the value of R so the line passes through (9,13) an (5,R) has a slope of m=1/2
Answer by lwsshak3(11628) About Me  (Show Source):
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Find the value of R so the line passes through (9,13) an (5,R) has a slope of m=1/2
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Slope=∆y/∆x=change in y/change in x=1/2
R-13/5-9=1/2
R-13/-4=1/2
2R-26=-4
2R=22
R=11