Which of the following is not a true statement about porportional graphs

Evaluate the discriminant of each equation. tell how many solutions each equation has and whether the solutions are real or imaginary. x^2 - 4x - 5 = 0

If 7x=9y, y/z = 7/5 , then x/z = (a) 2/7 (b) 7/9 (c) 9/5 (d) 9/7 (e) 5/9

On ryan's last social studies test there were two types of questions true/false worth 3 points each and multiple choice questions worth 4 points each