Scott C.
asked 05/17/21Given point (-11, -11) and vertex (-9, 1), determine the quadratic function in vertex form:
Given point (-11, -11) and vertex (-9, 1), determine the quadratic function in vertex form:
y = a(x - h)2 + k.
The value of a - h + k is
1 Expert Answer

Philip P. answered 05/18/21
Affordable, Experienced, and Patient Algebra Tutor
y = a(x - h)2 + k
where (h, k) is the center = (-9, 1) and a is a constant.
y = a (x - (-9))2 + 1 = a (x+9)2 + 1
Almost there. Now you just need to find the value of the constant a. To do that, plug in the given point (-11,-11):
y = a (x+9)2 + 1
-11 = a (-11+9)2 + 1
Solve for a.
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Scott C.
Figured it out. The answer is 7. Thank you anyhow05/17/21