The value of y at x = -2 will be -2.
What is a function?
A certain kind of relationship called a function binds inputs to essentially one output.
The machine will only accept specified inputs, described as the function's domain, and will potentially produce one output for each input.
In another meaning function is a machine that gives us output values also called dependent values on the basis of input or independent variables.
Given the function,
y=3x+4
Saying x = -2
By substituting
y = 3(-2) + 4
y = -2.
So value of y will be -2 at x = -2.
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