Help with math pls? I will fan and medal

- isuckatschool43

Help with math pls? I will fan and medal

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- isuckatschool43

##### 1 Attachment

- CderaAlien

The last one is NOT a function

- isuckatschool43

okay

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## More answers

- anonymous

A and B are for sure

- isuckatschool43

how?

- anonymous

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

- anonymous

Im not sure about C tho because its not a quadratic. graph it for me

- anonymous

Do you have a graphing calculator?

- isuckatschool43

https://www.desmos.com/calculator/xkzrsydixq

- anonymous

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

- anonymous

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.

- isuckatschool43

it graphs 3 y values
https://www.desmos.com/calculator/sxexqbsgq5

- anonymous

A is not a function because the -1 repeats, good catch @Alphabet_Sam lol

- isuckatschool43

okay can you help with some more please?

##### 1 Attachment

- anonymous

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

- anonymous

Do you know how to graph the two lines?

- isuckatschool43

k

- anonymous

Do you know how to graph those two lines?

- isuckatschool43

just enter them into the graphing calc?

- anonymous

you can plot the two points and then connect them with a straight edge (or a straight line on the pc) for both lines

- anonymous

What kind of math is this anyway? Liike what is the name of the course?

- isuckatschool43

it just says functions

- isuckatschool43

so like this?
https://www.desmos.com/calculator/2omlsi7mbv

- anonymous

Ok, are you able to connect the points of (-1,7) and (5,13)?

- anonymous

Like can u connect them with a line?

- isuckatschool43

yes

- anonymous

ok, do that for both sets of points

- isuckatschool43

it wont let me

- isuckatschool43

@Da_Homie it wont let me make lines for some reason

- anonymous

Ok, do you have graph paper where you are now??

- isuckatschool43

no i dont have any at this house

- isuckatschool43

sorry

- anonymous

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?

- isuckatschool43

yeah one second i found a way

- isuckatschool43

does this work?

##### 1 Attachment

- anonymous

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?

- isuckatschool43

yes

- isuckatschool43

like (1,9) maybe?

- isuckatschool43

its hard to tell

- isuckatschool43

@Da_Homie

- isuckatschool43

where did you go

- isuckatschool43

@Da_Homie hello?

- anonymous

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.

- isuckatschool43

my internet is being weird sorry

- anonymous

I have to go for now. I will be back later

- isuckatschool43

okay

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