Question

f:{-0,5;0,5;1;2;3;4}->R, f(x)=2x-1

Answer 1

f(-0)=2*(-0)-1=-1
f(5)=2*5-1=9
f(0)=2*0-1=-1
f(5)=2*5-1=9
f(1)=2*1-1=0
f(2)=2*2-1=3
f(3)=2*3-1=5
f(4)=2*4-1=7