When lines are perpendicular their slopes flip and?

For this case we have to:

Given two lines:

By definition, if both lines are perpendicular to each other, then the product of their slopes is -1. That is to say:

The product of the slopes of two perpendicular lines is -1.

the correct answer is b) histograms can be used to exhibit the shape of distributions. this is because histograms count the frequency of each possible answer, so one is able to see which results are more common and which are less common.

there are infinitely many solutions.