Answer:
The answer is b
Step-by-step explanation:
You put the x=6
6³-4(6)²-12(6)+15=15
You can rearrange f(x) as:
f(x) = 3(x^2 + 3x) + 12 = 3(x+1.5)^2 +5.25
So you can see the vertex is at (0,5.25) when x = -1.5
The axis of symmetry then lies in x = -1.5
Answer: A: there is not enough evidence to support a relationship between lunch preference and role at school
