broweyebrit
If f(x) = x + 2, find f(3).
1
6
5
−1



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lexiamee
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substitute 3 in for x then add

broweyebrit
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how do you do that?

hissingfauna
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f(3)=3+2=5

lexiamee
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how do you add??

lexiamee
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@hissingfauna I was trying to get them to think

hissingfauna
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@lexiamee good point, but I think they needed an explanation as to what substitution essentially is :)

lexiamee
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okay @hissingfauna