scatterplots and mix review 2

Front

What is a line of best fit used for?

Back

To make predictions.

Front

Which of the following could be a possible line of best fit for the data? y = -5/2x + 20, y = -x + 19, y = x + 20, y = 2/3x + 15

Back

y = -5/2x + 20.

Front

Solve for f: 2f + 4 = 12.

Back

f = 4.

Front

Find the height of the person using what you know about similar triangles: If a 6 ft tall person casts a shadow of 4 ft, how tall is a person who casts a shadow of 2.67 ft?

Back

Height = 4 ft.

Front

The red triangle has been dilated by a scale factor of 1/4, with the center of dilation at (0,0). What is the new image?

Back

Green triangle.

Front

What does a scatterplot represent?

Back

A scatterplot shows the relationship between two variables.

Front

What is the purpose of the correlation coefficient in scatterplots?

Back

To measure the strength and direction of a linear relationship between two variables.

Front

What does a positive correlation indicate in a scatterplot?

Back

As one variable increases, the other variable also increases.

Front

What does a negative correlation indicate in a scatterplot?

Back

As one variable increases, the other variable decreases.

Front

What is the scale factor in dilation?

Back

The ratio of the lengths of corresponding sides of the original figure and the dilated figure.