Use the data in Table 1.2 to calculate least squares estimates of the relationship between income and

Question:

Use the data in Table 1.2 to calculate least squares estimates of the relationship between income and spending. What is the estimated slope?
Income...............................................................................spending
292.......................................................................................493
730.......................................................................................802
1176......................................................................................1196
1636.......................................................................................1598
2292.......................................................................................2124
3243.......................................................................................2814
4207.......................................................................................3467
6598.......................................................................................4950