Answer: (0, -9)
Step-by-step explanation: To find the y-intercept of this quadratic, remember that the y-intercept is the point where the parabola crosses the y-axis.
We can simply plug a 0 in for x to find the y-intercept.
So we have y = (0)² - 9 or 0 - 9 which is -9.
This means the y-intercept is -9.