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9-58.

Start by writing an equation with those interceptsusing the Zero Product Property.
y = a(x + 4)(x − 1)(x − 3)

Find the stretch factor by substituting the point.

(60) = a((−1) + 4)((−1) − 1)((− 1) − 3)
60 = a(3)(−2)(−4)
60 = a(24)

Make sure to check your answer.