Which set of ordered pairs is a function A. {(-6,-4),(-4,-2),(0,0),(-4,-2),(-6, 4)}
B. {(-1,5,),(-1,4),(-1,3),(-1,2),(-1,1 )}
C. {(-2,1),(-4,2),(0-3),(4,1),(-2,5)}< br />D. {(-5,1),(-3,2),(-1,3),(1,3),(1,4),( 3,5)}
I'm taking the I-ready diagnostics and I need the answer please.​

Distance=slopeslope is -2/4which equals-1/2the distance between these two points is -1/2

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.