exam Maths Puzzle Numerical Ability

graph the functions.
f(x)= -2x - 5

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exam Other Question

could someone help me with this?

Which of the following functions is an even function?
1. f(x)=4x-2
2. f(x)=/6x+8/
3. f(x)=3-x^2
4. f(x)=x/x+1 please find the indicated values of g:x-->x+2