Which of the following rules represents a function?

eddy2017

eddy2017

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Hi, I am bringing this problem here as fucntions and relations are part of the skills i have to master. I am studyiing the topic.
Let a hint drop asto why I should be focusing on this here excercise

Which of the following rules represents a function?
thanks in advance,
eddy
 

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eddy2017 said:
Hi, I am bringing this problem here as fucntions and relations are part of the skills i have to master. I am studyiing the topic.
Let a hint drop asto why I should be focusing on this here excercise

Which of the following rules represents a function?
thanks in advance,
eddy
Click to expand...
Have you heard of the "Vertical line test?"

-Dan
 
topsquark said:
Have you heard of the "Vertical line test?"

-Dan
Click to expand...
yes, the vertical line test is applied to know if the graph is a function or not. if we draw a vertical line and it touches the graph only once then we have a function, if it touches the graph more than once, then we don't a function.
 
eddy2017 said:
yes, the vertical line test is applied to know if the graph is a function or not. if we draw a vertical line and it touches the graph only once then we have a function, if it touches the graph more than once, then we don't a function.
Click to expand...
1641665297847.png

really easy!. eg, the first graph is not function because it does not pass the vertical test, as well as d)
 
eddy2017 said:
they are!. these graphs are functions because if I draw a vertical line through any part of those graphs it will only cross it on one point. does not touch it twice.
Click to expand...
Graph c) again. Post back the graph if possible.
 
BigBeachBananas said:
Graph c) again. Post back the graph if possible.
Click to expand...
1641666905918.png
If i pass the vertical line thru graph c i see the line only touches the graph only one time. even if i pass the line thru the point (0,0) it touches once. only once. so it is a function
The video is in Spanish. translation: ''how to know if a function is a function or not?''.
 
eddy2017 said:
OH, You were talking about the answer choice here, right?. i misunderstood you.
Click to expand...
what are you talking about?. i don't understand your request. are you talking about the exercise here, or you still talking about the vertical line test?
as to the problem here, i do not know how to connect this knowledge i have about functions and relations with the answer choices. I'm not seeing the connection
 
eddy2017 said:
what are you talking about?. i don't understand your request. are you talking about the exercise here, or you still talking about the vertical line test?
as to the problem here, i do not know how to connect this knowledge i have about functions and relations with the answer choices. I'm not seeing the connection
Click to expand...
There's some miscommunication. You're correct about the vertical line test. Now, graph all of your functions in the OP and see which one pass the vertical line tests.
 
i know that a "function rule" simply is an equation which defines a function .it describes a functional relationship. in a function every x is assigned a y.
 
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