Estimate a line of best fit using two points on the line
a. y=-1/2x+9
b. y=2x+9
c. y=-2x+9
d. y=1/2x+9

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.