Please help, Polynomial Functions, giving brain list if show work!

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.

Determine the number of girls in a math class with 87 boys if there are 25 girls for every 75 boys

What values of x satisfy the inequality x^2-9x< 0? how is your answer shown on the graph?