Question

A line with a slope of 1 passes through the points (5,w) and (-7,-9). what is the value of w?

Answer 1

Slope = difference in y / difference in x
Slope = (w --9) / (5 --7)
Slope = (w +9) / (5 + 7)
12 * slope = w +9
w = 12*slope -9 and since slope = 1,
w = 12 -9
w = 3