Ross did an investigation into the relationship between temperature (ttt) and total hours of sunshine (sss) at Heathrow. He finds that for each additional degree of temperature there is 0.25 additional hours of sunshine, and that the intercept of the regression line is 1.3.
Give the equation of the regression line.
46 exam-style questions on Edexcel A Level Maths Correlation, covering 4.1 Correlation and 4.2 Linear Regression. Each one has a worked solution and a mark scheme showing where the marks go.