Is the Point on the line?

Question 1:

Does the point
(-18,-26)
lie on the line
y = x − 8
Yes

Question 2:

Does the point
(30,81)
lie on the line
y = 3x − 9
Yes

Question 3:

Does the point
(-16,-48)
lie on the line
y = 3x − 5
No

Question 4:

Does the point
(-15,-18)
lie on the line
y = x − 3
Yes

Question 5:

Does the point
(-17,-28)
lie on the line
y = x − 6
No

Question 6:

Does the point
(15,-61)
lie on the line
y = −4x − 1
Yes