What's special about graphs that have a < 0?

Find the area of a trapezoid with a height of 23, base 1 of 10 and base 2 of 18

Which term best describes the association between variables a and b? no association a negative linear association a positive linear association a nonlinear association a scatterplot with an x axis labeled, variable a from zero to ten in increments of two and the y axis labeled, variable b from zero to one hundred forty in increments of twenty with fifteen points in a positive trend.

What dimensions can créate more than one triangle ?