isuckatschool43
  • isuckatschool43
Help with math pls? I will fan and medal
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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jamiebookeater
  • jamiebookeater
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isuckatschool43
  • isuckatschool43
1 Attachment
CderaAlien
  • CderaAlien
The last one is NOT a function
isuckatschool43
  • isuckatschool43
okay

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anonymous
  • anonymous
A and B are for sure
isuckatschool43
  • isuckatschool43
how?
anonymous
  • 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
  • anonymous
Im not sure about C tho because its not a quadratic. graph it for me
anonymous
  • anonymous
Do you have a graphing calculator?
isuckatschool43
  • isuckatschool43
https://www.desmos.com/calculator/xkzrsydixq
anonymous
  • 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
  • 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
  • isuckatschool43
it graphs 3 y values https://www.desmos.com/calculator/sxexqbsgq5
anonymous
  • anonymous
A is not a function because the -1 repeats, good catch @Alphabet_Sam lol
isuckatschool43
  • isuckatschool43
okay can you help with some more please?
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anonymous
  • 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
  • anonymous
Do you know how to graph the two lines?
isuckatschool43
  • isuckatschool43
k
anonymous
  • anonymous
Do you know how to graph those two lines?
isuckatschool43
  • isuckatschool43
just enter them into the graphing calc?
anonymous
  • 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
  • anonymous
What kind of math is this anyway? Liike what is the name of the course?
isuckatschool43
  • isuckatschool43
it just says functions
isuckatschool43
  • isuckatschool43
so like this? https://www.desmos.com/calculator/2omlsi7mbv
anonymous
  • anonymous
Ok, are you able to connect the points of (-1,7) and (5,13)?
anonymous
  • anonymous
Like can u connect them with a line?
isuckatschool43
  • isuckatschool43
yes
anonymous
  • anonymous
ok, do that for both sets of points
isuckatschool43
  • isuckatschool43
it wont let me
isuckatschool43
  • isuckatschool43
@Da_Homie it wont let me make lines for some reason
anonymous
  • anonymous
Ok, do you have graph paper where you are now??
isuckatschool43
  • isuckatschool43
no i dont have any at this house
isuckatschool43
  • isuckatschool43
sorry
anonymous
  • 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
  • isuckatschool43
yeah one second i found a way
isuckatschool43
  • isuckatschool43
does this work?
1 Attachment
anonymous
  • 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
  • isuckatschool43
yes
isuckatschool43
  • isuckatschool43
like (1,9) maybe?
isuckatschool43
  • isuckatschool43
its hard to tell
isuckatschool43
  • isuckatschool43
@Da_Homie
isuckatschool43
  • isuckatschool43
where did you go
isuckatschool43
  • isuckatschool43
@Da_Homie hello?
anonymous
  • 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
  • isuckatschool43
my internet is being weird sorry
anonymous
  • anonymous
I have to go for now. I will be back later
isuckatschool43
  • isuckatschool43
okay

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