Regression line (AQA GCSE Statistics): Quizzes
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Practise the questions
10 questions from this quiz
What does the gradient (m) represent?
What does the gradient (m) represent?
Change in y per unit x
What is the y-intercept in y=1.05x-3?
What is the y-intercept in y=1.05x-3?
-3
How to find points on a regression line?
How to find points on a regression line?
Substitute x-values into equation
What does a positive gradient indicate?
What does a positive gradient indicate?
Positive correlation
Why are predictions less reliable outside data range?
Why are predictions less reliable outside data range?
Data is too sparse
What is the first step in creating a regression line from data points?
What is the first step in creating a regression line from data points?
Plot the data points on a graph
What does the equation y=20000-1500x represent?
What does the equation y=20000-1500x represent?
Both initial value and rate
What happens if x=0 in y=1.05x-3?
What happens if x=0 in y=1.05x-3?
y=-3
What is a line of best fit?
What is a line of best fit?
A regression line
What does a scatter diagram show?
What does a scatter diagram show?
Relationship between two variables