8th Math Q2 9 Weeks Exam Part 2Lee

Label the parts of the graph.

• y-intercept

• x-intercept

• origin

• x-axis

• y-axis

• -3/4

• 7

• -7

• 3/4

Tags

CCSS.8.EE.B.6

CCSS.8.F.A.3

What is the equation of the line with an x-intercept of 3 and a y-intercept of -2?

• y = (2/3)x - 2

• y = (-2/3)x + 2

• y = (2/3)x + 2

• y = (-2/3)x - 2

Raul drew several possible lines of fit for his data in the scatterplot. Which line is the line of best fit for the data?

• Line A

• Line B

• Line C

• Line D

Informally Fit a Straight Line. Which graph BEST shows the line of best fit for the data?

• graph A

• graph B

• graph C

• graph D

Which is MOST important when drawing a line of best fit for data on a scatter plot?

• Only the low and high data points.

• Only the data points below the line.

• Only the data points above the line.

• The closeness of all data points to the line.

Molly and Edgar are analyzing a dataset and each drew a line of fit for the data. Which graph shows the correct line of fit?

• A

• B

• C

• D

Whose line of fit best represents the data?

• Edgar's line because his line passes through more data points.

• Edgar's line because his line passes through the first and last point in the dataset.

• Molly's line because there is approximately the same number of points above and below the line.

• Molly's line because her line passes through fewer data points.

Tags

CCSS.8.EE.B.5

The scatter plot above shows the number of pages read compared to the number of hours read. Which linear equation below supports the best fit line on the scatter plot above?

• y = 20x

• y = 2x

According to the line of best fit, what would be the best estimate for the test score of someone who slept only 1 hour?

• 40

• 25

• 30

• 55