These are formulas to help solve the question. I believe you have to manupulate the formula.

Thinking: 3. If the slope of the line of best fit is = and the numbers below represent the values of the dependent variable, determine the correlation coefficient. Round to 4 decimal places. [3 marks] y: 10, 12, 15, 15, 17, 18, 21, 25nExy (Ex )Ey a = a is the slope and is calculated by the formula: nEx- (Ex ) nExy - (Ex ) Ev) r= Compare this to the formula for the correlation coefficient: What do you notice