The slope is the change in Y over the change in X
The change in y is -2-0 = -2
The change in X is 3-9 = -6
The slope is -2/-6, which simplifies to 1/3
Using the same numbers u started out with
The volume of the pyramid is 94.5
A histogram is like a bar graph without gaps between the rectangles. So you first create a bar graph with your labels and title, then you get rid of the gaps between the rectangles.