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I am trying to do a College Algebra project and I am having difficulty findimg the two equations that make the piecewise function in the pictures below.

Letting y be the number of meters the track is above or below the ground

and x the number of meters horizontally from the high point, write the

equation/s expressing y in terms of x for the roller coaster track. The

parabola changes from turning down to turning up at x = 15.

Letting y be the number of meters the track is above or below the ground

and x the number of meters horizontally from the high point, write the

equation/s expressing y in terms of x for the roller coaster track. The

parabola changes from turning down to turning up at x = 15.

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