# Write, in function machine form, the relationship between the number of elephants (e) and the number of elephants legs (l). a. b. Write your function machine as an algebraic function. l = 4e c. If there are 68 elephant legs, how many elephants are there? So the inverse function machine needed to answer this question is Therefore the number of

Chapter 24, Worked example #4

Write, in function machine form, the relationship between the number of elephants (e) and the number of elephants’ legs (l).

a.

b. Write your function machine as an algebraic function.

l = 4e

c. If there are 68 elephant legs, how many elephants are there?

So the inverse function machine needed to answer this question is

Therefore the number of elephants is 68 ÷ 4 = 17.

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## Cambridge Checkpoint Lower Secondary Mathematics Student's Book 7

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