Find the minimum or maximum of the quadratic function:
A) Minimum: 5
B) Maximum: -3
C) Minimum: 1
D) Minimum: 11
E) Minimum: 3

Question

Find the minimum or maximum of the quadratic function: 
A) Minimum: 5 
B) Maximum: -3 
C) Minimum: 1 
D) Minimum: 11 
E) Minimum: 3

Quizplus · Accepted Answer

Since the coefficient of the quadratic term is positive, the parabola opens upwards and the minimum/maximum is achieved at the vertex. Using the formula for the x-coordinate of the vertex, we get x = -b/(2a) = -(-1)/(2(2)) = 1/4. Plugging this value into the function, we get f(1/4) = -3, which is the maximum value. Therefore, the answer is (B) Maximum: -3.

Find the Minimum or Maximum of the Quadratic Function