Tom bought five candy bars and paid a total of $6.75, including tax. if each candy bar cost $1.25, how much tax did tom pay?
a) $0.25
b) $0.50
c) $0.75
d) $5.50

a function could be identified in 3 ways either on a chart,graph, or ordered pairs. first a function is that each point has its own. the rule is that there can be many x's to one y but there can not be 2 x's at different y's. so on a graph when you put a straight line through the y's there should be one dot only to be a function.

step-by-step explanation: