Making Predictions of Scatter-plots

Multiple Choice

BELL-RINGER QUESTION #1

Determine the slope of the given graph.

HINT: Use two points to determine the rate of change (rise/run).

• m= -3/2

• m= 1/2

• m= -2/3

• m= 3/2

Graphing

BELL-RINGER QUESTION #2

Draw a line from the linear equation

y= 5/4x - 3

REMEMBER: slope-intercept form y=mx+b where variable-m is the slope (rate of change) and variable-b is the y-intercept (starting point on the y-axis).

Hotspot

The scatterplot shows the relationship between the daily high temperature and the number of snow cones sold at a concession stand on that day. Based on the scatterplot, approximately how many snow cones will be sold on a day when the high temperature is 82°F?

UNIT 3 QUIZ PART 1 - 71% CORRECT

Multiple Choice

PARTNER PRACTICE

4. The scatter-plot shows the low temperature and high temperature each day for a two-week period of time. Based on the scatter-plot, which is the best prediction of the high temperature in degrees Fahrenheit on a day when the low temperature is 71°F?

• 92°F

• 101°F

• 88°F

• 100°F

Multiple Choice

PARTNER PRACTICE

5. The scatter-plot shows the height in centimeters and weight in kilograms of several students. Based on the scatter-plot, which is the best prediction of the height in centimeters of a student with a weight of 64 kilograms?

• 152 cm

• 160 cm

• 162 cm

• 156 cm

Multiple Choice

PARTNER PRACTICE

6. Students recorded the total number of pages and chapters in each of several books on the scatter-plot. Based on the scatter-plot, which is the best prediction of the total number of pages in a book with 4 chapters?

• 150 pages

• 140 pages

• 90 pages

• 120 pages

Multiple Choice

INDEPENDENT PRACTICE

7. The scatter-plot shows the time spent playing video games and the number of points scored by several students. Based on the scatter-plot, which is the best prediction of the number of points scored by a student who spends 45 minutes playing video games?

• 1,200 points

• 920 points

• 1,060 points

• 1,300 points

Hotspot

INDEPENDENT PRACTICE

8. The scatterplot shows the number of hours that 12 people spent learning to type on a keyboard and each person’s average typing speed.

Based on the scatterplot, what is the best prediction of the person’s average typing speed in words per minute (wpm) if the person spent 5 hours learning to type?

Hotspot

INDEPENDENT PRACTICE

9. The manager of a restaurant recorded how many people were in different groups of customers and how much those groups spent on food and beverages.  Based on the scatterplot, about how much money would a group of 10 people be expected to spend on food and beverages at this restaurant?

Multiple Choice

EXIT TICKET 12/03 - TEK 8.5D

Based on the scatterplot, what is the best prediction of the average number of hours a person spends at work every week if that person spends an average of 10 hours on recreational activities every week?

• 33 hours

• 85 hours

• 50 hours

• 65 hours