I have a pretest for my new maths teacher, and I'd like to impress her. Please help with one question?
Identify the range of the equation y = −x2 − 12x + 3.

Question

anonymous · Answer

Answer choices:

A)   All real numbers

 B)   y ≤ 39

 C)   y ≥ −6

 D)   y ≤ −105

anonymous · Answer

Please Help? :) Thanks!!

anonymous · Answer

just graph it and see the range....the range is all the possible y values of a graph heres an online grapher :) http://www.wolframalpha.com/input/?i=y+%3D+%E2%88%92x%5E2+%E2%88%92+12x+%2B+3

anonymous · Answer

so looking at that, the graph shows that the highest point is 39 and then the graph continues on downward into $-\infty$....so the range of the graph is y $\le$ 39

hope this helps :)

anonymous · Answer

Thanks so much!

anonymous · Answer

No problem! ;)