Question 625171
You are given the coordinates of the vertex (7,8) and of a point (-4,-9) on a parabola. Find the equation of the parabola
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Vertex form of parabola:
y= a(x-h)^2+k 
plug provided info to find a:
8= a(7-(-4))^2+(-9)
8= a(7+4)^2+(-9)
8= a(11)^2+(-9)
17= a(11)^2
17= a(121)
17/121 = a
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Equation then is:
y= (17/121)(x-(-4))^2+(-9)
y= (17/121)(x+4)^2-9