What is the equation in slope-intercept form for the line that passes through the points (-2, -1) and (1, 5)?

1 Answer
Apr 7, 2018

color(green)( y = 2x + 3, " where slope = m = 2, y-intercept = b = 3"

Explanation:

http://slideplayer.com/slide/7733011/http://slideplayer.com/slide/7733011/

(x_1, y_1) = (-2, -1), (x_2, y_2) = (1,5)

Equation of the line is

(y - y_1) / (y_2 - y_1) = (x - x_1) / (x_2 - x_1)

(y + 1) / (5 + 1) = (x +2) / (1 +2)

(y + 1) / cancel(6)^color(red)(2) = (x + 2) / cancel 3

y + 1 = 2x + 4

http://slideplayer.com/slide/2331020/http://slideplayer.com/slide/2331020/

"Slope intercept form equation is "y = mx + b

:. y = 2x + 3, " where slope = m = 2, y-intercept = b = 3"