Which of the following quadratic regression equations best fits the data shown below?
X -4 -3 -2 -1 0 1 2 3 4
y 60 34 10 6 8 14 20 56 98
O A. y = 4.67x2 + 4.10x+ 2.87
B. y = 2.87 x2 + 2.70x+4.07
c. y = 3.11x2 + 1.20x + 3.64
O D. y = 2.09x2 + 1.30x + 4.61

First step is to get rid of the square root. remember that a square root is the same as raising to the (1/2) power. see below: multiply exponents per exponent rules to get: remember you subtract exponents from the denominator and add exponents in the numerator so: simplify further: so a is the correct choice. if you don't understand this google exponent rules and it will you understand. look at the image results.

You want to isolate your variable.