Question

Suzie determined the range of a quadratic function to be y ? –5. Choose the correct interval notation.

Answer 1

Explanation:

(-∞, -5] , the correct answer is C.

Answer 2

I am not sure which symbol you meant to include so will do all four of them:

y > -5 --------> (-5, ∞)

y ≥ -5 --------> [-5, ∞)

y < -5 --------> (-∞, -5)

y ≤ -5 --------> (-∞, -5]

The PARENTHESIS is used when the number is NOT included (open dot).

The BRACKET is used when the number IS included (closed dot).