Plot the function y = -2x + 4, use the graph to indicate at which values the value of y is -2.

We are given a straight line by the equation y = -2x + 4. We need to find at what value of the variable x the value of the function y (x) = -2.

To do this, we will compose and solve a linear equation in one variable.

And we will start by substituting -2 instead of y in the given function equation.

-2x + 4 = -2;

We solve the resulting equation. The first step is to move 4 from the left to the right side of the equation:

-2x = -2 – 4;

-2x = -6;

And it remains for us to find the value of the variable as an unknown factor:

x = -6: (-2);

x = 3.

Answer: for x = 3; y (3) = -2.