Using the formula for calculating the simple interest, the following table of values is prepared.
These are the points to be plotted in the graph sheet, let us take the deposits along x – axis and annual simple interest along y – axis.
We choose the scale as follows.
Then we plot the points and draw the straight line.
From the graph we find.
- Corresponding to ₹ 450 on the x – axis, we get the interest as ₹ 67.5 on the y – axis.
- Corresponding to ₹ 100 on the y – axis we get the deposit as ₹ 666 on the x – axis.