Part D.
Should the tip be graphed on the x-axis or the y-axis?
The tip is the result of multiplying the percent by the amount of money, then the tip is a dependent variable so the tip should be graphed on the y-axis.
Which quadrants are useful for this graph? Why?
The first quadrant is the important one because all quantitites are positive, that is, the amount of money and tips are positive numbers.
What are the greatest and smallest values of x and y that must fit on the graph? From the given information, the small value of x is $10 and the greatest is $100. Then, the smallest value of y is
and the greatest value of y is
How can you scale your axes to create the most effective graph for Mr. Wallis?
The x-axis can start at 1.5 with steps of 1 unit and the y-axis can start at 10 with steps of 10 units
Part E.
The graph is
Since the value of part C is x= $36, the y-value is approximately 5.5.
Which representation helped to find the most accurate tip? Which was easiest to use?
For money with values not multiples of 10 the table is more accurate. For values of the money multiples of 10 the graph is easiest to use.