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Maths Exercices

Evaluate a linear function

To evaluate a function, or find a functional value, means to substitute a given value in the domain into the equation to find the corresponding element in the range.

Given f(x)=x+3, find f(2)

Plug x=2 into the function and simplify.

f(x) = x+3    
f(2) = 2+3   Plug x=2
f(2) = 5   Simplify

Use the function rule f(l)= to find f(2)
Solution: f(2)=