Help with questions-

At the state fair, Erin and her cousin ride the Ultra Drop roller coaster. When the ride plummets down the first hill, it dips below the loading platform. At the bottom, a camera snaps the riders' picture before hurtling them back toward the sky.

The equationy=x²- 9x+ 20 models the roller coaster's path over time. The variableyrepresents height (in feet) above or below the platform. Aty= 0, the roller coaster is even with the platform. The variablexrepresents the amount of time (in seconds) since the ride began.

Factor and graph the equation to better understand Erin's ride.Write the equation in factored form.