Question

Which of the following graphs represent a function?

*can’t take any pictures because my camera doesn’t work but I’ll describe each graph*

Graph A - upward parabola
Graph B - hyperbola
Graph C - a circle
Graph D - a horizontal parabola

Please help thanks

Answer 1

If you can draw a vertical line that hits any part of the graph more than once, it's not a function. (That's the vertical line test.)

Graph A sounds fine.

Graph B shouldn't be.

Graph C is definitely not a function.

Graph D is not a function.

Again, if any vertical line hits the graph twice, it's not a function.