PLEASE HELP :) Geometry question

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.

I’m stuck on this equation, anyone got the answer?

Determine the area of a triangle with (see picture below)