Select the correct answer. which relation is a function? a. {(2, 3), (1, 5), (2, 7)} b. {(-1, 5), (-2, 6), (-3, 7)} c. {(11, 9), (11, 5), (9, 3)} d. {(3, 8), (0, 8), (3, -2)}

Choice B represents a function

Step-by-step explanation:

For a relation to be a function, each x input should yield exactly one y output. Going by this definition, the relation given by alternative A is not a function since the x input 2 yields two different values of y. For alternative C, 11 yields 9 and 5 as the outputs hence contradicting the definition of a function. For alternative D, the value 3 yields two different y values.

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step-by-step explanation:

y = | -2(-2) |     →     y = | 4 |     →     y = 4       ⇒   (-2, 4)

y = | -2(-1) |     →     y = | 2 |     →       y =   2       ⇒   (-1, 2)    

y = | -2(0) |     →     y = | 0 |     →       y = 0         ⇒   (0, 0)

y = | -2(1) |   c →     y = | -2 |     →     y =   2         ⇒   (1, 2)    

y = | -2(2) |     →     y = | - 4 |     →     y =   4         ⇒   (2, 4)