You literally take the average of the x's, take the average of the y's, or maybe I should say the mean to be a little bit more specific. A mean of only two points. And you will get the midpoint of those two
You can find the midpoint of each class by adding the lower class limit and the upper class limit, then dividing by two: Class midpoint = (lower
Find the midpoint and the margin or error. That is write this interval in the form: \[a\pm b\] Solution. Let's first find the midpoint. This is the average of the left and right