Question

What would Nate need to add to his model for it to be equivalent to Joe's model

Answer 1

Joe has the expression:

`x+3\cdot1+2(-1)=x+3-2=x+1`

And Nate has the expression:

`x+4\cdot1=x+4`

In order to have the same expression, Nate has to substract 3 units. This can be done by adding 3 "(-1)".

Then Nate would have:

`x+4+3(-1)=x+4-3=x+1`

Answer: 3 units of "-1" (Option C).