Graph scale & prediction question: I'm given a table of data and need to draw a graph (x and y axis), I need to find a suitable scale to incorporate a prediction of depth at age 30. What scale would be best and how do I predict the depth?

Given:
The data table is given in the question with Depth and Age information.
Required:
To find a suitable scale to incorporate a prediction of depth at age 30.
Answer:
In order to find a suitable scale to incorporate a prediction of depth at age 30, we can take the scale with increment of 500 up to 5500 on the x-axis for Depth and the scale with increment of 5 up to 40 for Age.
This scale would best the data and predict the depth at the age of 30.
Final Answer:
We can take the scale with increment of 500 up to 5500 on the x-axis for Depth and the scale with increment of 5 up to 40 for Age.