InkLoop/NYS Standards/NY-8.SP.2NY-8.SP.2
8th GradeStatistics and Probability70 target questions
Know that straight lines are widely used to model relationships between two quantitative variables. For scatter plots that suggest a linear association informally fit a straight line and informally assess the model fit.
Sample Practice Questions (3)
1
Look at the scatter plot below. A student draws a line of best fit that passes through the points and . Explain why this line may or may not be a good fit for the data provided in the table.
| x | y |
|---|---|
| 1 | 3 |
| 2 | 4 |
| 4 | 5 |
| 6 | 8 |
| 8 | 9 |
| 9 | 11 |
Open response · diagram · tableSee Answer + Explanation →
2
A researcher collected data on the number of hours spent exercising per week and the resting heart rate (beats per minute) for several individuals. The scatter plot below shows the data with three different lines of best fit drawn. Which line best represents the data?
ALine A
BLine B
CLine C
DNone of the lines represent the data well.
Multiple choice · diagramSee Answer + Explanation →
3
The scatter plot below shows the number of hours students spent studying for a math test and their scores on the test. Which statement best describes the association between the hours studied and the test scores?
AThere is a strong positive linear association.
BThere is a strong negative linear association.
CThere is no association.
DThere is a non-linear association.
Multiple choice · diagramSee Answer + Explanation →
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NY-8.NS.1Know that numbers that are not rational are called irrational. Understand informally that every number has a decimal expansion; for rational numbers show that the decimal expansion repeats eventually and convert a decimal expansion which repeats into a rational number.→NY-8.NS.2Use rational approximations of irrational numbers to compare the size of irrational numbers. Locate them approximately on a number line diagram and estimate the value of expressions.→NY-8.EE.1Know and apply the properties of integer exponents to generate equivalent numerical expressions. For example 3² × 3⁻⁵ = 3⁻³ = 1/27.→NY-8.EE.2Use square root and cube root symbols to represent solutions to equations of the form x² = p and x³ = p where p is a positive rational number. Evaluate square roots of small perfect squares and cube roots of small perfect cubes.→