The pictogram shows information about the number of vinyl records sold in a shop on Monday and Tuesday.
a) How many records were sold on Monday?
b) How many records were sold on Tuesday?
e e

The first thing we want to do is to make the equation a function, so we put y by itself on one side,

Add 4 to both sides

y = 2x + 4   <<< This is the equation that we will use

So if we input these numbers in,

The answer seems to be D. Where if x = 0 then y = 4 and so on