Discriminant is the value b^2 -4*a*c once the quadratic is in standard form x^2 + 11x + 121 = x + 96 subtract x from both sides x^2 + 10x + 121 = 96 subtract 96 from both sides x^2 + 10x + 25 = 0 10^2 - 4 * 1 * 25 100 - 100 = 0 Discriminant is 0
Y = -9x - 10 The dolphin is diving 9 feet per second so the rate of change is -9. It's also 10 feet below sea level which makes the y-intercept -10 Hope this helped!
