The true statement is (a) Carla is on the right track because she is finding the slopes of consecutive sides to check for perpendicular sides.
Their equations are given as:
[tex]m_{CD} = \frac{2 -3}{1 - 2}[/tex]
[tex]m_{DE} = \frac{1 -2}{4 - 1}[/tex]
[tex]m_{CD} = \frac{2 -3}{1 - 2}[/tex]
[tex]m_{EF} = \frac{3 -1}{5 - 4}[/tex]
Both equations of slope are correct.
However,
Hence, Carla is on the right track
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