Simple line equation and graphing question

Problem: determine any two points along line whose equation is: 2x - y = 4

If I let x = 0, then equation becomes -y = 4.
But, my book doesn't explain the concept of a "negative" y.

Do I conclude that -y = 4 is same as "positive" y = -4?

Do I conclude that -y = 4 is same as "positive" y = -4?
yes convert to the "positive" y.

Answer for your first point will then be (0, -4)

If you plot out the line 2x - y = 4, you will see that the point (0, -4) will be on the line.

When x = 0 y = -4. This is the intercept point of the line and the Y axis.
Similarly when y = 0, x = 2 , i.e. the intercept point of the line and the |X axis

given these two points (0, -4) and (2,0), draw a line connecting them and you have your graph