I am assuming you meant to write b(x) = x-4.

Since this is a linear function, the domain is all real numbers.
The equation of a line is y = mx+b, where m is the slope. In this equation m = 3, so the slope is upward and to the right, above the 45-degree angle. Only graph J fits this description.
22) 2*16=32
32-6=26
23)15*1/5=3
24)45*1/5=9
25)7*2=14
14+8=22
26)1/5^2=1/25
1/25*50=2
33%of360=118.8
equation: 33% of 360= 360*33%=118.8