Question

A family is tracking its spending habits. Over the past year, the grocery bill has ranged from $110 to $170. Suppose you were going to plot these points on a coordinate grid. (a) What is a good scale to use for the y-axis? Explain your reasoning. (b) What is a good interval to use for the y-axis? Explain your reasoning.

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Answer 1

a). I would start at $100 through $200. since the range doesn't start until $110 there is no reason to show the numbers 0-90.

b). I would then go up by 10 on each interval. going up by 10 can easily be graphed and accurate.