Question

To determine if the graph of a relation is a function, you could use the ____________ test.

domain
range
function
vertical line

Answer 1

vertical line test.

any vertical line should only pass through ONE x point.

if there are 2 y points for an x point, that graph does not represent a function.

Answer 2

That's what I thought:)

Answer 3

Well a function will never have two values for a given value of x .A vertical line drawn lets us check whether a given graph is a function or not.