If the coefficient of each squared term in a quadratic function is positive,the function is
A)concave.
B)convex.
C)elliptical.
D)sinusoidal.

Question

Quizplus · Accepted Answer

A quadratic function with a positive coefficient of the squared term is a function of the form $f(x)=ax^2+bx+c$ where $a>0$. This means that the graph of the function opens upwards (in the positive $y$-direction) and has a minimum point. Such a graph is said to be convex. Therefore, the correct choice is (B).

If the Coefficient of Each Squared Term in a Quadratic