How do you find a standard form equation for the line (2,-1) (0,-4)?

1 Answer
Jul 8, 2016

y = 3/2 x - 4

Explanation:

The equation of the straight line is given by:

y= ax +b

Where a is the slope and b is the y-intercept.

First start by finding the slope. The slope is determined using the following formula:

a= (y_2 - y_1)/(x_2 - x_1)

a = (-4 - (-1))/(0 - 2)

a = (-3)/-2

a = 3/2

0 and -4 is a point on the graph. Use its coordinates to find the y-intercept.

y = 3/2 x + b

-4 = 3/2 xx 0 + b

b= -4

graph{3/2 *x - 4 [-10.54, 9.46, -12.28, -2.28]}