Write an equation for the quadratic graphed below

Question

x
-intercepts: (-1,0) and (3,0).
y
-intercept: (0,1)

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Answer 1

x-intercepts: (-1,0) and (3,0)
y = a(x+1)(x-3)

That means y(0) = a(1)(-3) = -3a = 1
y = -1/3 (x+1)(x-3)