A line with a slope of -2 has coordinates (2,7) and (5,y). What is y?

1 Answer
Jul 6, 2016

y = 1

Explanation:

slope m for a line passing through points (x_1, y_1), (x_2, y_2) = (y_1 - y_2)/(x_1 - x_2)

-2 = (7-y)/(2-5)

-2 = (7-y)/-3 =>

-2 *(-3) = 7 - y

7 - y = 6 => y = 7-6 => y = 1