Hi.. U should do like this
4/5 mile in 50 min
X mile in 60 min
X=5/4 mile
The answer of the above equation value of g = 22/3
The distance between the 2 points is at the point (0,3). Did I answer your question?
The letter "x" is often used in algebra to mean a value that is not yet known. It is called a "variable" or sometimes an "unknown". In x + 2 = 7, x is a variable, but we can work out its value if we try!
Hope this helps