The question contains a table and instructions for mathematical tasks such as constructing a table, plotting a graph, and interpreting the results. Here's how we can approach each part based on the visible text in the image:

Instructions Breakdown:

1. Part (a): Construct a table for $x^2$ and $\frac{1}{y}$.

   • Use the given data for $x$ and $y$ from the table.
   • Compute $x^2$ for each value of $x$.
   • Compute $\frac{1}{y}$ for each value of $y$.

2. Part (b): Plot $\frac{1}{y}$ against $x^2$.

   • Use a scale of 2 cm for $x^2$ (horizontal axis) and 0.5 unit for $\frac{1}{y}$ (vertical axis).
   • Draw the best-fit line through the points.

3. Part (c): Use the graph from part (b) to answer:

   • $(i)$ Find the value of $y$ when $x = 1.6$.
   • $(ii)$ Express $y$ in terms of $x$ using the graph.

Would you like me to:

1. Construct the table for $x^2$ and $\frac{1}{y}$?
2. Provide guidance on plotting the graph?
3. Assist with the interpretation of the graph for part (c)?

Let me know how you'd like to proceed!