helpp me solve c pls

C) A linear regression is used to determine the amount of sales in dollars based on advertising RM spent. The model is expressed as: y=2500+35x. i) What is the interpretation of the slope? (2 marks) ii) What is the interpretation of the intercept? (2 marks) iii) The coefficient of determination is 0.70. What does this mean in this situation? (4 marks) iv) What is the correlation between sales and advertising Ringgit? (3 marks) v) is the correlation positive or negative? How do you know