Question

The slope of the line passes through the points (6,r) and (13,5) is 2/7. What is the value of r?

Answer 1

slope=rise/run
another way to fid is
if you have points
(x1,y1) and (x2,y2)
slope is = (y2-y1)/(x2-x1)

we have points (6,r) an (13,5)

slope=2/7
2/7=(5-r)/(13-6)
2/7=(5-r)/(7)
multiply both sides by 7
2=5-r
minus 5
-3=-r
mult -1
3=r


r=3