A linear function is given by the formula y = 2x- 1. Find the value of the function if the value of the argument is 4.

First of all, first, it should be noted that if we need to find the value of a function for a given value of the argument, then this means that for x = 4 we need to determine what will be y. Accordingly, for this we need to substitute in the function equation given in the task text instead of x the value that it takes according to the task condition. So, you need to substitute the number 2 instead of x. Then we get:

y = 2 * x – 1 = 2 * 2 – 1 = 4 – 1 = 3.

Answer: for x = 2, the function takes on a value equal to 3.