a relation that assigns exactly one output (range) value ... · a relation that assigns exactly one...

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arelationthatassignsexactlyoneoutput(range)valueforeachinput(domain)value.

asetoforderedpairs

alloftheinputvalues

alloftheoutputvalues

throughmorethanonepointofthegraphthenforsomevalueofxthereismorethanonevalueofy.Therefore,therelationisnotafunction.

ifanyverticallinepasses

anequationthatdescribesafunction.

whenf(x)isusedtoindicatetheoutputs.Youreadf(x)as“fofx”or“fisafunctionofx.”

theinput(x)valuesofthefunction.Theyaregraphedonthehorizontalaxis.

theoutput(y)valuesofthefunction.Theyaregraphedontheverticalaxis.

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Aplumberchargesa$30feetovisitajoband$25perhourfortheworkhedoesthere.Writearuletodescribethethetotalcostofhisvisitasafunctionofthenumberofhoursspentworkingatthesite.