A researcher wants to determine whether there is a linear relationship between weight and blood pressure of a person. She randomly selected six people and measured their weight and blood pressure.

Weight for person A was $75$ kg and blood pressure was $125.$

Weight for person B was $85$ kg and blood pressure was $130.$

Weight for person B was $90$ kg and blood pressure was $140.$

Weight for person B was $80$ kg and blood pressure was $160.$

Weight for person B was $60$ kg and blood pressure was $150.$

Weight for person B was $70$ kg and blood pressure was $145.$

Prepare a well labelled scatter plot for this data and calculate the correlation coefficient for the linear relationship between weight and blood pressure. Show all the calculations.