Question

Select all the lines that represent functions

Answer 1

bcd

Explanation:

i got it right

Answer 2

B, C, D are functions

Explanation:

Functions are those that do not share an x value. Look at A. x-values are used twice everywhere except the vertex. This is not a function, it is just a relation. B does not at any time share x-values, so this is a function. C is also a function, and so is D. F is a vertical line that shares the same x value throughout the whole line, so this is definitely not a function.