Question

A line has a slope of 2 and contains the points (1, 3) and (2, y). The value of y is

Answer 1

$\sf{Slope =\frac{y_2-y_1}{x_2-x-1}$

Plug in what we were given:

$2 = \frac{y-3}{2-1}$

Simplify the denominator:

$2 = \frac{y-3}{1}$

$2 = y-3$

Add 3 on both sides:

$\boxed{\bf{y=5}}$

The value of y is 5.