Question

Find the slope of the line, or state that the slope is undefined.

Answer 1

Notice that the line goes down by 3 units for each 3 units that it goes to the right:

The slope of a line is defined as the ratio between the change in the variable y divided by the change in the variable x:

`m=(\Delta y)/(\Delta x)`

In this case, Δy=-3 and Δx=3. Then:

`m=(-3)/(3)=-1`

Therefore, the slope of the line is equal to -1.