Equations like the following are said to be linear:
y = x + 2
This is because all the variables are to the power of one.
Given the x values of -4 to 2, we can easily calculate the y values, as follows:
If we were to input every possible x value (including those with decimals like 0.1, 0.11, 0.12, and so on), we'd get a straight line. We can say that the domain is the set of all possible x values and the range is the set of all possible y values. Note that any non-vertical or non-horizontal line is a function with its domain and range consisting of all real numbers.
It's easy to see that our preceding f(x) ...
