A relation is a function if you associate exactly one output for every input. This means that, when you choose a value for x, there must be only one correspondent value for y. This only happens in the top-right parabola.
X^2 + 9x -10 = (x -1)(x +10) = (x +(-1)) (x + 10)
p = -1 and q = 10
answer is A.
Roots can be written as fraction exponents. An exponent of 1/2 means the square root.
I will help if you post a picture or something
5 peaces and 5 blueberry packages 0.75*5=3.75. 1.50*5=7.5. 3.75+7.5=11.25