If f(12)=4(12)-20, what function gives f(x)

Step-by-step explanation:

We have been given that

In order to find the function f(x), we can use the concept of substitution.

Let us suppose we need to find the value of the function f(x) at x = 12. Then, we can substitute x = 12 in the function f(x).

Here,

It means that x is replaced with 12.

So f(x) should be

step-by-step explanation:

points a and b are equidistant from the desired line, so the line you find by using them will go through point r.

using points other than a and b will give the desired line only if they are equidistant from r. if they are randomly located, the perpendicular line you create will not necessarily go through point r, hence will not be a solution to the problem.