Y=4-5x y=.2x -4.5 perpendicular? Why?

Mathematics

1 answer:

bonufazy [111]2 years ago

6 0

Step-by-step explanation:

Just look at the slopes, i.e., the factor before the x. They should be reciprocal to have perpendicular lines.

Reciprocal means that if the slope of one line is <em>a</em>, the slope of the other line should be <em>-1/a</em>.

Here we have -5 and 0.2, and indeed -1/-5 = 0.2, so they are perpendicular.

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