Your Friend - Basic Mathematics
Graphs help us visualize data. What we see on the graph may help us interpret and analyze the data. The result is usually a better perspective that may not have been possible to acquire just by looking at a bunch of numbers.
Fractions are used to indicate the number of parts of a whole to be considered. You can use a fraction to show a ratio. In a ratio, the numerator shows the part of a group you are considering and the denominator shows the rest of the group.
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Compatible numbers are numbers that look nice or friendly with each other when we do calculations, including addition, subtraction, but especially - division.
A sequence is a set of numbers that follow a pattern. A geometric sequence is a sequence where each term is found by multiplying or dividing the same value from one term to the next. We call this value "common ratio".
An arithmetic sequence is a sequence where each term is found by adding or subtracting the same value from one term to the next. We call this value "common sum" or "common difference".