8th Grade Math 1st Semester Review

Front

What is the mean absolute deviation (MAD)?

Back

The mean absolute deviation (MAD) is a measure of the dispersion of a set of data points. It is calculated by taking the average of the absolute differences between each data point and the mean of the data set.

Front

How do you calculate the mean of a data set?

Back

To calculate the mean, add all the numbers in the data set together and then divide by the total number of values.

Front

What is a proportional relationship?

Back

A proportional relationship is a relationship between two quantities where the ratio of one quantity to the other is constant.

Front

What does it mean if a graph passes through the origin?

Back

If a graph passes through the origin (0,0), it indicates that there is a proportional relationship between the variables represented on the graph.

Front

What is a function in mathematics?

Back

A function is a relation where each input (x-value) has exactly one output (y-value).

Front

How can you determine if a relation is a function from a table?

Back

You can determine if a relation is a function by checking if each input has only one corresponding output.

Front

What is a scatterplot?

Back

A scatterplot is a graph that shows the relationship between two variables by displaying data points on a Cartesian plane.

Front

What does a positive linear trend in a scatterplot indicate?

Back

A positive linear trend indicates that as one variable increases, the other variable also increases in a linear fashion.

Front

What is the difference between linear and non-linear trends in a scatterplot?

Back

A linear trend shows a straight line relationship, while a non-linear trend shows a curved relationship between the variables.

Front

What is the slope of a line?

Back

The slope of a line is a measure of its steepness, calculated as the rise (change in y) over the run (change in x).