8.DSP.1 & 8.DSP.6: Scatter Plots Practice

Front

What is a scatter plot?

Back

A scatter plot is a graph that shows the relationship between two quantitative variables by displaying data points on a two-dimensional axis.

Front

What does a positive relationship in a scatter plot indicate?

Back

A positive relationship indicates that as one variable increases, the other variable also tends to increase.

Front

What does a negative relationship in a scatter plot indicate?

Back

A negative relationship indicates that as one variable increases, the other variable tends to decrease.

Front

How can you determine the strength of a relationship in a scatter plot?

Back

The strength of a relationship can be determined by how closely the data points cluster around a line of best fit; closer points indicate a stronger relationship.

Front

What is the purpose of a line of best fit in a scatter plot?

Back

The line of best fit summarizes the trend in the data and helps predict values.

Front

What does it mean if the points in a scatter plot are widely spread out?

Back

Widely spread out points indicate a weak relationship between the variables.

Front

How do you calculate the expected value based on a scatter plot?

Back

To calculate the expected value, you can use the trend indicated by the line of best fit to estimate the value of one variable based on the value of the other.

Front

What is the average spending of a family of 6 if the average spending per person is $30?

Back

The average spending of a family of 6 would be $180 (6 x $30).

Front

If Joe earns $20 per hour, how much will he earn for 30 hours of work?

Back

Joe will earn $600 (30 hours x $20/hour).

Front

What is the significance of correlation in scatter plots?

Back

Correlation measures the strength and direction of a linear relationship between two variables.