Find the Range -1/2x^2+9x-4

$- \frac{1}{2} x^{2} + 9 x - 4$

Step 1

The range is the set of all valid $y$ values. Use the graph to find the range.

Interval Notation:

$(- \infty, \frac{73}{2}]$

Set-Builder Notation:

${y | y \leq \frac{73}{2}}$

Step 2