The equation of a line of best fit (Edexcel GCSE Statistics): Quizzes
📚Quizzes
Practise the questions
10 questions from this quiz
ShowHide
Practise the questions
10 questions from this quiz
What does the regression line equation y=mx+c represent?
What does the regression line equation y=mx+c represent?
Line of best fit
How do you find points to draw the regression line?
How do you find points to draw the regression line?
Choose x-values, compute y
What is the first step in plotting the regression line from an equation?
What is the first step in plotting the regression line from an equation?
Choose two x-values
Why should x-values at data range ends be chosen for plotting?
Why should x-values at data range ends be chosen for plotting?
More accurate line
What is the y-intercept in y=1.05x-3?
What is the y-intercept in y=1.05x-3?
-3
What does a positive gradient in y=mx+c indicate?
What does a positive gradient in y=mx+c indicate?
Variables increase together
How do you interpret a gradient of 1.05 in y=1.05x-3?
How do you interpret a gradient of 1.05 in y=1.05x-3?
Y increases by 1.05 per x
Why might the y-intercept be unreliable in predictions?
Why might the y-intercept be unreliable in predictions?
Outside data range
What does the gradient measure in a regression line?
What does the gradient measure in a regression line?
Rate of change
What does an equation with y = mx + c show about variables?
What does an equation with y = mx + c show about variables?
Linear relation