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The last one is NOT a function
A and B are for sure
Look at the X. If the X repeats then it is only a relation. If you can do either the vertical line tst or see that the outputs arent repeating in the X then they are functions
Im not sure about C tho because its not a quadratic. graph it for me
Do you have a graphing calculator?
Ok, so it is a function because a vertical line only would pass through one point. So AB and C are all functions to my understanding
A isn't a function because it maps one x value to two y-values. B and C are, but I'm not sure on D.
it graphs 3 y values https://www.desmos.com/calculator/sxexqbsgq5
A is not a function because the -1 repeats, good catch @Alphabet_Sam lol
yea, see how if you drew a vertical line on -1 it would pass through two points instead of one? That was what I meant by Vertical Line test. And yea hold on
Do you know how to graph the two lines?
Do you know how to graph those two lines?
just enter them into the graphing calc?
you can plot the two points and then connect them with a straight edge (or a straight line on the pc) for both lines
What kind of math is this anyway? Liike what is the name of the course?
it just says functions
so like this? https://www.desmos.com/calculator/2omlsi7mbv
Ok, are you able to connect the points of (-1,7) and (5,13)?
Like can u connect them with a line?
ok, do that for both sets of points
it wont let me
@Da_Homie it wont let me make lines for some reason
Ok, do you have graph paper where you are now??
no i dont have any at this house
Its ok. We will have to imagine lines then. So if we "drew" a line connecting the red dot and the blue dot, and the green and purple dots you can kind of see where they intersect at, you know what I mean?
yeah one second i found a way
yes, perfect! So now that you have graphed the line, all you have to do is find the coordinates of the point that intersects them, you see?
like (1,9) maybe?
its hard to tell
where did you go
Sorry, Im back, I had to do something. So you take your best guess and then check to see what the answers are. So the closest thing to (1,9) is (1,7) so that is probably your answer.
my internet is being weird sorry
I have to go for now. I will be back later