Question

ARE THESE FUNCTIONS YES OR NO? PLS HELP ME

Answer 1

1 - Function
2 - Not a Function
3 - Function
4 - Not a Function
5 - Function
6 - Function

Answer 2

Only graph 5 is a function because if you do the vertical line test, you draw a vertical line anywhere on the graph. If the parabola crossed the line twice it would not be a function.