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Using Function Notations 1996 Views


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Description:

How do you use function notations? We're glad you asked! No, really. Otherwise, we made this video for nothing.

Language:
English Language

Transcript

00:00

using function notation -a la shmoop well thank goodness we never get

00:07

distracted while doing our math homework. but seriously do you see that Saints [girl frowns sitting at a desk]

00:11

game last weekend? what a blowout. what we're talking about again ?oh right

00:15

getting distracted. well any time we plug an x value into a function to see what

00:18

the corresponding Y value is we can get lost in our tracks and forget what we're [train goes by]

00:22

doing. for example say we want to find the Y value the output, when X the input,

00:28

equals 3 for the equation y equals 4x minus 3. well if we forget what we

00:34

initially plugged in we'll have to go back to the question to figure it out. if

00:38

we use function notation and write f of 3 equals 4x minus 3 then plug into 3 we

00:44

end up with F of 3 equals 9. and remember that when X is 3 y or the output is 9. it [equation on screen]

00:52

might seem a bit funky the function notation becomes much easier to use over

00:56

time as long as we remember that X is the input and Y is the output. oh look a

01:01

squirrel. [squirrel runs in front of chalkboard]

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