Find the Range f(x)=-2x+5 if x<1; 4x-1 if x>=1

$f (x) = {\begin{cases} - 2 x + 5 & x < 1 \\ 4 x - 1 & x \geq 1 \end{cases}$

Step 1

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