a coordinate plane is a two-dimensional number line where the vertical line is called the y-axis and the horizontal is called the x-axis. And a number line is
a line on which numbers are marked at intervals, used to illustrate simple numerical operations. So how are the related........?
(a)

different possibilities
(b)


So, there is a 1 in 4 chance that both dice will show an even.
You would go through 4.5 bottles