Scatter Plots & Systems Word Problems (Unit 4 Review)

Front

What type of correlation does a scatter plot show when the values increase together?

Back

Positive correlation

Front

What type of correlation does a scatter plot show when one value increases while the other decreases?

Back

Negative correlation

Front

What does it mean if a scatter plot shows no correlation?

Back

There is no relationship between the two variables.

Front

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

Back

A straight line that best represents the data points on the scatter plot.

Front

How do you determine the equation of a line of best fit?

Back

By using statistical methods such as least squares regression.

Front

In a system of equations, what does it mean if the lines intersect?

Back

The system has one unique solution.

Front

In a system of equations, what does it mean if the lines are parallel?

Back

The system has no solution.

Front

In a system of equations, what does it mean if the lines coincide?

Back

The system has infinitely many solutions.

Front

If Joe bought 10 cups of coffee and 5 doughnuts for $16.50, what equation represents this situation?

Back

10c + 5d = 16.50

Front

If Joe bought 5 cups of coffee and 10 doughnuts for $14.25, what equation represents this situation?

Back

5c + 10d = 14.25