Question

Math question

Answer 1

@dan815 Is it C or D?

Answer 2

a function passes the vertical line test: if you draw an up/down line, it it allowed to cross the function only once.

that works for all of the graphs.
now turn the graphs sideways. only one will pass the vertical line test.
that one is the answer

Answer 3

or, if you like, draw a horizontal line. the correct answer must pass the horizontal line test.

Answer 4

@phi So it's D since it passes the horizontal line test?

Answer 5

yes