Question

Use the vertical line test to determine whether the relation is a function. Explain your response.

Answer 1

not the best drawing ever...but gets the point across

do those vertical lines go through ONLY 1 point?

are any of those lines passing through 2 points on that graph?

Answer 2

umm no

Answer 3

then this equation is in fact a function....if a line were to pass through 2 points....it would not be

Answer 4

ok thanks

Answer 5

here's the reasoning behind it....

say i said go to x=2

and i asked what does the graph = when x = 2?

well there are 2 points on that line

when x = 2 is the graph saying it is equal to that top point...or that bottom point?

we don't know so it wouldn't be a function

Answer 6

ok