Slope equals -2 white intercept equals -2

Brook states that the distance on the line is 4 units. caleb states that the whole line does not have a distance because it continues on forever. vivian states that the line is 6 units long. which distance did brook measure? which distance did vivian measure?

Which equation represents the function on the graph?

If the discriminant if a quadratic equation is 4 which statement describes the roots?