exam Maths Puzzle Numerical Ability

If f(x)=4x-3, find the following:

f(-1)

If f(x)= 5x-1, find the following:

f(a-2)

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exam Other Question

How would you classify and graph the following system?

y=x+4
y+x=4

Then, how would you find the solution to this system from the graph?
Thank you! Find the function rule for the following input/output function table.

input/output
-2/12
1/9
4/6

What is the function rule?