Answer:
It's the bottom right, the rectangle
All are relations except for relation 3
I think it is true but I am not 100% sure thought but good luck

Rounding to nearest thousand gives 76,000 mg of chlorine
= 2x^2 - 20x + 49 = 2(x^2 - 10x + 49/2)
y= 2((x-5)^2 - 25 + 49/2) = 2((x-5)^2 - 1/2) = 2(x-5)^2 - 1
q =5, r=-1, p=2
Vertex = (q,r) = (5,-1)
hope it helps plz mark as brainliest