Determine whether increasing decreasing or constant
f (x)=5x-2
fx = -2x+8
fx 3/4x - 4
Here some theory... Linear function - Wikipedia, the free encyclopedia
You might also want to learn some LaTex -- it makes reading the equations MUCH easier. I wasn't sure what you wrote, but I assume you mean these:
$\displaystyle f(x) = 5x - 2$
$\displaystyle f(x) = -2x + 8$
$\displaystyle f(x) = \frac{3}{4}x - 4$
To find out whether these functions are increasing, decreasing, or constant, check their slopes.