Question

Line m passes through point (2,-7) and (4,-9). Line m is parallel to which line?

Answer 1

As the slope is -1, so any line that has the same slope is parallel.

Solution:

Given points (2, -7) and (4, -9) find the slope, m:

`m = (y - y_1)/(x - x_1)`

`\Rightarrow m = (-7 - (-9))/(2 - 4)`

`m = (-7 + 9)/(-2)`

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

Any line that has the same slope is parallel.