Write as y=mx+b f(x)=x+3x-4+5

$f (x) = x + 3 x - 4 + 5$

Step 1

Rewrite the function as an equation.

$y = x + 3 x - 4 + 5$

Step 2

Simplify $x + 3 x - 4 + 5$ .

Add $x$ and $3 x$ .

$y = 4 x - 4 + 5$

Add $- 4$ and $5$ .

$y = 4 x + 1$