Question

For what values of x is f(x) =-2x - 3 increasing? For what
values of x is it decreasing?

Answer 1

The value of y is decreasing for all real values of x (-∞,∞).

Explanation:

Seeing as we have a simple 1st power equation, the slope will remain the same. So, we solve for slope to see if this equation is for an increasing or a decreasing line.

y = mx + b, where m = the slope of the line

Is the standard slope form of a line, which matches the one given.

so in our equation, f(x) = -2x -3, our m value is -2.

Seeing as -2 is less than 0, the answer is:

The value of y is decreasing for all real values of x (-∞,∞).