Question

unit 5, lesson 5
more graphs of functions
lets interpret graphs of functions.
5.1 which three go together: graphs
which three go together? why do they go together?
a

b

c

d

Explanation:

Graphs A, C, and D each represent a function: for every input (x-value), there is exactly one output (y-value). Graph B fails the vertical line test (a vertical line would intersect it at two points), so it is not a function.

Answer:

The three that go together are A, C, and D. They are all graphs of functions (each x-value maps to exactly one y-value), while B does not represent a function.