Question
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
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 equation y = x2 - 9x + 20 models the roller coaster's path over time. The variable y represents height (in feet) above or below the platform. At y = 0, the roller coaster is even with the platform. The variable x represents the amount of time (in seconds) since the ride began.
b. What is the height and time at which Erin's picture is taken during the roller coaster ride? Hint: Erin's picture is taken at the lowest point of the roller coaster.
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