Question

Which quadratic function opens up?

Y= -x^2+ 3
Y= -(x + 3)^2
Y= -3x^2
Y= x^2- 3

Answer 1

y = x^2 - 3

Explanation:

Quadratic function in general form:

• y = ax^2 + bx + c

The graph opens up if a>0, opens down if a < 0

The function that opens up is:

• y = x^2 - 3