Question

How would you solve this problem?

Answer 1

Answer: [c, ∞)

Explanation:

Range is all of the y-coordinates.

The parabola is upright (∪) because the coefficient of x² is positive.

So the minimum value is at "c" and the parabola tends toward infinity.

Range: y ≥ c in Interval Notation: [c, ∞)