Question 61709
Given y = 3x --->(1)
The point is represented by (x ,y)
So the point (0 , -------)
Put x = 0 in the equation(1), we get
y = 0.
Therefore the missing values, (0, 0)

Now again put  x = -1, we get
y = 3(-1) = -3
Therefore the values are (-1 , -3)


Now again put x = 7 in equation(1), we get
y =3(7) = 21
Therfore the value  are (7,21)


Hence whenever you are given an equation and the first value "x", just substitute to get the missing value.

(0, 0) (-1, -3) (7, 21)