2.) Select the relation that IS a function.
a. {(-6, -5), (3, 2), (10,8), (3, 3)}
b. {(-2, -1), (5, -1), (16,3), (-3,-9)}
c. {(5, 10), (-3, 10), (-3,-10), (4,7)}
d. {(21, 11), (21, 10), (21, 9), (21, 8)}

1. isolate the variable, in this case, d. subtract 35.5 on both sides of the equation.2. 52 subtracted by 35.5 is 16.53. therefore your answer would be d= 16.5this is the basics of pre algebra, isolating variable through adding, subtracting, multiplying, and dividing, if you have any other questions to ask just comment!

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