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Sagot :

Answer:

A, C, and D

Step-by-step explanation:

Remember that in a function, every unique input must have one output. Therefore, two or more outputs cannot have the same input. Knowing this, we can eliminate choice B. Therefore, A, C, and D are correct.

Answer:

A, C, D are all functions

Step-by-step explanation:

functions have a single output value for any unique input.

A can be rearranged to y = -2x - 8 which is linear with a non-infinite slope and is a function

C is a parabolic opening downward. Only a single output for each unique input.

D acts as a function as each unique input has a single output, even though that output may not be unique. The thing about table functions is it's hard to predict when a single input might create multiple output values.

B is not a function as an x input, lets say x = 2 will have outputs of y = 3  and y = -3.  

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