Take the 2-minute tour ×
Mathematics Stack Exchange is a question and answer site for people studying math at any level and professionals in related fields. It's 100% free, no registration required.

find the value of R so that the line through (3, 13) and (R, -5) has a slope of 8

share|improve this question

2 Answers 2

You know that the formula for slope is given by: $$ m = \frac{y_{2}-y_{1}}{x_{2}-x_{1}}$$ and given that the value for $m=8$. Use this to find the value of $R$.

share|improve this answer

We have $$m = \frac{-5-13}{R-3} = 8$$ and solve for $R$.

share|improve this answer

Your Answer

 
discard

By posting your answer, you agree to the privacy policy and terms of service.