3.4.3 The function as a table

An alternative representation of a function is as a table, where the two columns denote the values of x and y respectively, and the rows indicate the value of y at a given value of x. For example the following table indicates that 20 gallons of gas will cost $21.40.

 

Table 1: Tabular representation of the function relating gallons of gas purchased to total cost.

x = # of Gallons	y = Total cost
1	1.07
2	2.14
5	5.35
12	12.84
20	21.40
33	35.31
50	53.50