Question

what is a verticle line test in a function? how it passes?

Answer 1

good question...

for example you have a graph:

Answer 2

can anyone explain me?

Answer 3

how you draw it . I mean how you come to this diagram in a graph?

Answer 4

when you apply the vertical line test, you draw several vertical lines ON the graph

Answer 5

@annie1111 that graph was just an example

Answer 6

just draw a line parallel to y-axis
if the drawn line meets the curve only at single point
then the graph is a function
else if the drawn line intersects the graph at more than one point then it is not a function

Answer 7

now...you have vertical lines. count how many times the LINES and the GRAPH intersected
in this case, EACH vertical line crossed the graph only ONCE...therefore it's a function

Answer 8

now...let's take another graph for example (again this is completely made up)