Question

Write an equation of the line that passes through (2,-4) and (0,-4)

Answer 1

y=-4

Explanation:

I know my stuff

Answer 2

y = mx + b

To find the slope(m), you use the slope formula:

`m = (y_(2)-y_(1))/(x_(2)-x_(1))`

You plug in the points into the equation.

`m = (-4 - (-4))/(0 - 2)`

`m = (-4+4)/(0-2) = (0)/(-2) =0`

The slope is 0

y = 0x + b

Any number multiplied by 0 is 0. So:

y = b

To find b, you plug in the y value of either of the points.

-4 = b

Your equation is:

y = -4 (This is a horizontal line)