Question

How Do I solve these?

Answer 1

flvs?

Answer 2

Yes.

Answer 3

for the range, you just write out all the possible values of y
you only need list each one once

Answer 4

as for the "which is a function?" one, the definition of a function is:
each x is associated with exactly one y
that means that if one value of x corresponds to two or more values of y it is *not* a function

Answer 5

ok so would the first two answers be C ?

Answer 6

yes :)
very good

Answer 7

the fourth one would be 'NO" correct? as 5 is in both the left and right, or does there have to be two in this case also?

Answer 8

now for the next one you can think of the same rule we just used for the last problem
this idea corresponds to what is called the vertical line test:
if you can draw a vertical line and hit more than one point on the graph that is the same as having one x correspond to only one y (you should think about why that's true)

Answer 9

So the third one is D? or maybe, B? Most likely D.

Answer 10

the question is: does the same value of x occur more than once on the left, corresponding to at least two different values of y?

Answer 11

No, the same thing is not happening.

Answer 12

for the third one draw a vertical line
if the line hits more than one piece of the graph it is *not* a function
if anywhere you draw the vertical line intersects exactly one point on the graph it *is* a function

Answer 13

for example

Answer 14

this is a function because anywhere I draw a vertical line it intersects the graph only once

Answer 15

This is not because it intersects twice correct?

Answer 16

one intersect for each line, as opposed to...exactlly