Plot a graph of y against M from the given data, and determine its slope. M is mass in grams, y is depression in cm (y0 - ym). Data points: (100g, 0.400cm), (200g, 0.650cm).

To solve question (i), we need to plot a graph of $y$ against $M$ and then determine its slope. Based on the table and the procedure, $M$ is the mass in grams, and $y$ refers to the depression, which is given by the row "$y_0 - y_m$" in centimeters.

Step 1: Identify the data points for $M$ and $y$.
The data points $(M, y)$ are:

• $(100\text{g}, 0.400\text{cm})$
• $(200\text{g}, 0.650\text{cm})$