Question

This data is going to be plotted on a scatter graph.

Length (cm) 103 129
Mass (kg)
4.1
99
82
2.6
5.7
1.9
110
2.8
The Length axis is shown below.
Choose the best scale for this axis. What should the values of A and B be?

Answer 1

To choose the best scale for the Length axis, we need to consider the range of values in the data set. The range of length values is 103 to 129 cm, which means the scale should start at or just below 100 and end at or just above 130.

To determine the values of A and B, we can use the following formula:

A = (minimum value) - (10% of range)

B = (maximum value) + (10% of range)

Using this formula, we get:

A = 103 - (0.1 x 26) = 100.4

B = 129 + (0.1 x 26) = 131.4

Therefore, the best scale for the Length axis is 100 to 130 cm, with tick marks at intervals of 10.