In a(n) sequence the ratio of successive terms is a constant

First Week of Notes What is a function  Plug in an “input” and gives one output  Codomain/range Examples of a function: To know if a graph is a function or not, it has to pass the vertical line test. Meaning you draw a vertical line anywhere on the graph and if it touches two points of the line on the graph, it is NOT a function. The table is a function because all inputs only go to one output. For example -2 can not go to both 4 and 0 BUT one output can go to two inputs as you can see in that example, the output 4 goes to both -2 and 2. In the case of y=f(x) = x 2 Y is the dependent variable and (x) is the independent variable. Not Functions: This is not a function