Aphotograph 5 inches wide by 6 inches high is to be enlarged so that the new height is 20 inches. what will the width of the enlargement be?

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.

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is this part of a question or something