A scatter plot shows two measurements for each thing. If the points drift upward the association is positive, downward and it is negative, and the line of best fit is the straight line that runs through the middle of them.
The line of best fit is y=3x+2. Predict y when x=10
Put 10 in for x.
3 times 10, plus 2.
The answer is 32.
Where students go wrong
Calling an association strong because the line fits the line. What matters is how close the points sit to it, not how steep it is.
Also called line of best fit, correlation or trend line.
Questions about these worksheets
Yes. Every scatter plot sheet is free to print and free to download as a PDF. There is no account to make, no email to hand over and no limit on how many you take.
Yes. The answer key prints on a second page, and you can choose whether it shows each question beside its answer or just the answers in a list.
Yes. Print straight from the page, or download the PDF and print that. The sheet is laid out for paper rather than squeezed off a screen, so there is room to work under each question, and the answer key comes out on its own page.
Statistics is usually taken around 11th or 12th grade, though schools vary and plenty of students meet it earlier or later. Pick the difficulty rather than the grade: the easy level suits a first lesson on it, the hard level suits review before a test.
Yes, as many as you like. The questions are built fresh each time rather than picked from a fixed set of files, so pressing Generate gives a new sheet. That is what you want for a second class, a retake, or two students sitting next to each other.
That is the closest comparison, and Kuta Software is good software. It is also paid software you install on a computer. These worksheets run in a browser tab for free, with no account and nothing to install. Like Kuta, the scatter plot questions are generated when you ask for them rather than pulled from a fixed set of files, so two classes never get the same sheet, and the answer key comes with it.
Yes. There are three levels, and you can tick more than one for a sheet that mixes them, in which case the questions come out easiest first. The harder levels are not just larger numbers: they ask for something the easy ones do not.
Calling an association strong because the line fits the line. What matters is how close the points sit to it, not how steep it is.