This week we have learned about domain and range which takes an important role in this topic. when looking at a graph, the domain represents the x-coordinates which is the independent value, while the range represents the y-coordinates which is the dependent value.

There are usually two types of graph to show the relation, one type is using dots, while one is using a line or a curve. But they have differences. Graphs that are composed of a series of dots are referred to as discrete graphs. A discrete domain is a set of input values that consist of only certain numbers in an interval because dots between dots are separate and are not connected, so they don’t have any linkage.

Another type of graph are composed of a connected curve are referred to as continuous graphs. A continuous domain is a set of input values that consists of all numbers in an interval, which means values can be decimal or fractions.