Question

a) determine whether the graph represents a function and then use the graph to determine the domain and rage of that function

Answer 1

easy way to check if a graph represents a function is to draw a vertical line for each x. If the line intercept a graph in just 1 point at every x, then it's afunction. If more than 1 it is not

Answer 2

this come up to four on the yx axis

Answer 3

draw vertical lines...

like u can see, they all intersect a graph in just one point. So it's a function

Answer 4

example of not a function: