Question

The points (4,7) and (r. – 5) lie on a line with slope – 3. Find the missing coordinate r ​

Answer 1

`r=(14)/(3)`

Explanation:

Set up an equation and solve for r using the formula for slope:

`(5-7)/(r-4)=-3\\ \\-2=-3(r-4)\\\\-2=-3r+12\\\\-14=-3r\\\\(14)/(3)=r`