Scatter graphs, correlation and estimates: check 1
Difficulty: ★★☆Info
Maths4U Original · Short practice
Paired observations are given below. For estimates, use the supplied fitted line \(y=3 x + 31\).
| x | y |
|---|---|
| 1 | 33 |
| 2 | 38 |
| 3 | 40 |
| 4 | 44 |
| 5 | 45 |
| 6 | 49 |
Choose the direction of the association.
Choose one answer.
Scatter graphs, correlation and estimates: review variant 1
Difficulty: ★★☆Info
Maths4U Original · Short practice
Paired observations are given below. For estimates, use the supplied fitted line \(y=32 - 4 x\).
| x | y |
|---|---|
| 1 | 27 |
| 2 | 25 |
| 3 | 20 |
| 4 | 17 |
| 5 | 11 |
| 6 | 8 |
Choose the direction of the association.
Choose one answer.
Scatter graphs, correlation and estimates: check 2
Difficulty: ★★☆Info
Maths4U Original · Short practice
Paired observations are given below. For estimates, use the supplied fitted line \(y=32 - 4 x\).
| x | y |
|---|---|
| 1 | 27 |
| 2 | 25 |
| 3 | 20 |
| 4 | 17 |
| 5 | 11 |
| 6 | 8 |
Using the supplied fitted line, estimate y at \(\displaystyle x=5\).
Enter one exact number or fraction unless the question specifies rounding. If it asks for a coefficient of π, enter that coefficient only. Give full reasoning separately for written problems.
Scatter graphs, correlation and estimates: review variant 2
Difficulty: ★★☆Info
Maths4U Original · Short practice
Paired observations are given below. For estimates, use the supplied fitted line \(y=x + 33\).
| x | y |
|---|---|
| 1 | 33 |
| 2 | 36 |
| 3 | 36 |
| 4 | 38 |
| 5 | 37 |
| 6 | 39 |
Using the supplied fitted line, estimate y at \(\displaystyle x=2\).
Enter one exact number or fraction unless the question specifies rounding. If it asks for a coefficient of π, enter that coefficient only. Give full reasoning separately for written problems.
Scatter graphs, correlation and estimates: check 3
Difficulty: ★★☆Info
Maths4U Original · Short practice
Paired observations are given below. For estimates, use the supplied fitted line \(y=x + 33\).
| x | y |
|---|---|
| 1 | 33 |
| 2 | 36 |
| 3 | 36 |
| 4 | 38 |
| 5 | 37 |
| 6 | 39 |
Using the supplied fitted line, estimate y at \(\displaystyle x=4.5\).
Enter one exact number or fraction unless the question specifies rounding. If it asks for a coefficient of π, enter that coefficient only. Give full reasoning separately for written problems.
Scatter graphs, correlation and estimates: review variant 3
Difficulty: ★★☆Info
Maths4U Original · Short practice
Paired observations are given below. For estimates, use the supplied fitted line \(y=34 - 2 x\).
| x | y |
|---|---|
| 1 | 31 |
| 2 | 31 |
| 3 | 28 |
| 4 | 27 |
| 5 | 23 |
| 6 | 22 |
Using the supplied fitted line, estimate y at \(\displaystyle x=4.5\).
Enter one exact number or fraction unless the question specifies rounding. If it asks for a coefficient of π, enter that coefficient only. Give full reasoning separately for written problems.
Scatter graphs, correlation and estimates: check 4
Difficulty: ★★☆Info
Maths4U Original · Short practice
Paired observations are given below. For estimates, use the supplied fitted line \(y=34 - 2 x\).
| x | y |
|---|---|
| 1 | 31 |
| 2 | 31 |
| 3 | 28 |
| 4 | 27 |
| 5 | 23 |
| 6 | 22 |
According to the fitted line, find the change in y when x increases by 2.
Enter one exact number or fraction unless the question specifies rounding. If it asks for a coefficient of π, enter that coefficient only. Give full reasoning separately for written problems.
Scatter graphs, correlation and estimates: review variant 4
Difficulty: ★★☆Info
Maths4U Original · Short practice
Paired observations are given below. For estimates, use the supplied fitted line \(y=3 x + 25\).
| x | y |
|---|---|
| 1 | 27 |
| 2 | 32 |
| 3 | 34 |
| 4 | 38 |
| 5 | 39 |
| 6 | 43 |
According to the fitted line, find the change in y when x increases by 2.
Enter one exact number or fraction unless the question specifies rounding. If it asks for a coefficient of π, enter that coefficient only. Give full reasoning separately for written problems.