y=5x +40

What that is saying is that y equals five times whatever x is +40.

So, if x=1, then y=45

x | y

----------

-2 | 30

-1 | 35

0 | 40

1 | 45

2| 50

To solve these, all I did was plug the number in as x. For example,

If x=2:

y=5(2)+40

y=10+40

y=50

Or, if x=-2:

y=5(-2)+40

y=-10+40

y=30