SOLUTION: How can I determine if the equation y=3x-5 is a function or not? please I really can't understand math lessons easily please help me thankyou

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Question 1038909: How can I determine if the equation y=3x-5 is a function or not? please I really can't understand math lessons easily please help me thankyou

Found 2 solutions by ikleyn, rothauserc:
Answer by ikleyn(52797) (Show Source):
You can put this solution on YOUR website!
.
From the context.

You can determine it from the context.

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In the following post the tutor "rothauserc" writes

". . . y = x^2 is not a function . . . ".

In contrary, IT IS, as everybody knows.

Answer by rothauserc(4718) (Show Source):
You can put this solution on YOUR website!
a function relates an input to a single output
:
f(x) = 3x - 5
:
f(1) = -2
:
f(2) = 1
:
f(3) = 4
:
a graph of this function is
:

:
from the graph, we see that an input (x axis values) are related to a single output (y axis values)
:
note that y = x^2 is not a function since -2 and 2 are related to the same value 4
: