Question

Which of the lines is perpendicular to the line shown in the graph

Answer 1

The line passing through (-8, 10) and (-1, 4).

Explanation:

Two lines are perpendicular if the product of their slopes is -1. The slope of the line in the picture is
`7\over 6`, so we should find a line with slope of
`-6\over 7`.

Note that the slope of the line in the last option is
`-7\over 6`.