Sometimes a pattern that involves letters is actually a numerical pattern in disguise

40 describe the outliers from the scatter plot.

How many solutions does the nonlinear system of equations graphed bellow have?

For problems 29 - 31 the graph of a quadratic function y=ax^2 + bx + c is shown. tell whether the discriminant of ax^2 + bx + c = 0 is positive, negative, or zero.