Find y if the line through (3,y) and (5,7) has a slope of 2?

Answer 1

Hi Maddey,

If you apply the definition of the slope to this problem, you get:

7-y 7-y

slope = 2 = _______ = _______

5-3 2

7-y

so: 2 = ______

2

Cross-multiply: 2*2 = 7-y ----> 4 = 7-y

Subtract 7 on both sides: -3 = -y

Divide both sides by -1: 3 = y

Final answer: y = 3