good day, may i please be assisted with this question that I'm struggling with.

Question 7 The economist believes that the higher the price would lead to lower sales volume. A researcher collected the price and sales information to find the relationship between these two variables. The data collected are showed in the table below: 7.1 Construct a straight-line regression equation to estimate the sales volume. (10 Marks) 7.2 Calculate the sales volumes if the price is 10? (2 Marks) 7.3 Calculate the Pearson's correlation coefficient and interpret the