The range is the set of all valid values. Use the graph to find the range. Find the Range f(x)=x+1 if x<4; x-1 if x>=4 Do you need help with math? Try our mobile app Our app allows students to get instant step-by-step solutions to all kinds of math troubles. Try it for Free! Our MATH EXPERTS JackHudson Charlie Trom Lucy Evel Post navigation Simplify 91/42Simplify cos(x)*1+tan(x)^2 Scroll to top