The best scale for the axis shown below is 1 : 25 . The values of A and B would be 25 and 150 respectively.
To choose the scale for the graph, we need to consider the values of x in the table given;
The values of A ranges from 82 and the maximum being 129 . The selected scale must accommodate all the values of x given in the table.
Using a scale of 1 unit to represent 25 cm , it would accommodate the values in the table.
Hence, the values of A and B are 25 and 150 cm respectively.