Given right triangle PQR which represents the value of
sin(P)?
RO
RP
PO
F
Na
o
PO
RO
PR

The graph is not a function because it does not pass the vertical line test. When the x value is 6, there are two y values. This means that 2 y values correspond with one x values. You can tell because both are closed circles. For the graph to be a function, one circle would have to be open and the other closed.