i dont understand how to do this:b(x)=18−0.5x when x=−2,0, and 5

We have the next function
[tex]b(x)=18-0.5x[/tex]If x=-2
[tex]b(-2)=18-0.5(-2)=18+1=19[/tex]If x=0
[tex]b\mleft(0\mright)=18-0.5(0)=18[/tex]If x=5
[tex]b\mleft(5\mright)=18-0.5(5)=18-2.5=15.5[/tex]ANSWER
b(-2)=19
b(0)=18
b(5)=15.5