Check/help over Algebra 1 answers? ( the '*' are my answers)

Is (0,3) a solution to the equation y = x + 3?
yes ***
no

Is (1, -4) a solution to the equation y = -2x?
yes
no ***

Look at the following points.
(4,0)(3,-1)(6,3)(2,-4)

Which are solutions to y=x-4? choose all correct answers.
6,3
4,0 **
3,-1 **
2,-4

There are 8 crackers in 1 serving, 16 crackers in 2 servings, 24 in 3, and so and so on. How many crackers are there in a box of 12 servings?
80
96 **
108
120

Now I need help answering these questions (:
Give an example of an open equation.
How can you use an equation to make a prediction from a pattern?