Find the Range f(x)=-3x+4 if x<1; 4x-3 if x>=1

$f (x) = {\begin{cases} - 3 x + 4 & x < 1 \\ 4 x - 3 & x \geq 1 \end{cases}$

Step 1

The range is the set of all valid $y$ values. Use the graph to find the range.