How to represent y=5x+40 with an equation

Well you already have it in alope intercept form

-5x+y=40 is in standard form

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