A line with a slope of -4 passes through the points (s, -4) and (0, 0). What is the value of s?

1 Answer
Apr 11, 2016

s=1

Explanation:

First let's get an equation for the line.
You're probably used to doing that like this:

y=mx+b (we need to find m and b)

The problem states that the slope is -4,
so m=-4

if we plug in the known point (0,0) for (x,y)
we get:
0=-4(0)+b
0=0+b

b=0

so the equation of the line is y=-4x+0 or y=-4x

now do the following:
(s,-4)-> x=s, y=-4

-4=-4(s)+0
-4=-4(s)

s=1