Practice the questions of McGraw Hill Math Grade 8 Answer Key PDF Lesson 23.2 Line Graphs to secure good marks & knowledge in the exams.
McGraw-Hill Math Grade 8 Answer Key Lesson 23.2 Line Graphs
Exercises
INTERPRET
Question 1.
Which month has the highest amount of rainfall?
Answer:
June month has the highest amount of rainfall.
Explanation:
Amount of rainfall in Jan = 1 inch.
Amount of rainfall in Feb = 2 inch.
Amount of rainfall in Mar = 1 inch.
Amount of rainfall in April = 1 inch.
Amount of rainfall in May = 2 inches.
Amount of rainfall in June = 5 inches.
Amount of rainfall in July = 4 inches.
Amount of rainfall in Aug = 2 inches.
Amount of rainfall in Sept = 2 inches.
Amount of rainfall in Oct = 2 inches.
Amount of rainfall in Nov = 1 inch.
Amount of rainfall in Dec = 2 inches.
Question 2.
The owner of a produce store studied this line graph showing potato consumption. On what three days should she make sure to have extra potatoes on hand?
Answer:
On Sunday, Saturday and Wednesday she should make sure to have extra potatoes on hand.
Explanation:
Number of potatoes consumed on Monday = 15 kilos.
Number of potatoes consumed on Tuesday = 20 kilos.
Number of potatoes consumed on Wednesday = 30 kilos.
Number of potatoes consumed on Thursday = 10 kilos.
Number of potatoes consumed on Friday = 15 kilos.
Number of potatoes consumed on Saturday = 25 kilos.
Number of potatoes consumed on Sunday = 35 kilos.
Question 3.
On which days would you expect usage of electricity to be the highest?
Answer:
On Friday, Saturday and Wednesday would you expect usage of electricity to be the highest?
Explanation:
Temperature used on Thursday = 31°C
Temperature used on Friday = 33°C
Temperature used on Saturday = 33°C
Temperature used on Sunday = 24°C
Temperature used on Monday = 23°C
Temperature used on Tuesday = 27°C
Temperature used on Wednesday = 33°C
Question 4.
Summarize the trend displayed in this graph.
Answer:
The trend display in the graph is from 0 to 820, with the interval of 82 points.
In the graph. when did Dave scored highest points and the least points at Darts.
Highest points at 7PM.
Least points at 10 PM.
Explanation:
The range of the points scored by Dave is from 0 to 820.
Frequency difference:
0 to 82.
82 to 164 = 164 – 82 = 82.
In the graph. when did Dave scored highest points and the least points at Darts.
Number of points scored at 7 PM = 820.
Number of points scored at 8 PM = 600.
Number of points scored at 9 PM = 350.
Number of points scored at 10 PM = 200.
Number of points scored at 11 PM = 250.
Question 5.
Write a sentence summarizing the rapid decrease in value of a car.
Answer:
With age and increase in mileage from 0 to 1,20,000 the value of your car decreased from 14,000 to 2,500 is bound to decrease.
Explanation:
There is an optimum decrease in the value of car from 14,000 to 2,500 because of the increase in mileage.
Value of car decreased from 14,000 to 1,2000 in mileage increase 20,000.
Value of car decreased from 12,000 to 8,000 in mileage increase 40,000.
Value of car decreased from 8,000 to 5,000 in mileage increase 60,000.
Value of car decreased from 5,000 to 4,000 in mileage increase 80,000.
Value of car decreased from 4,000 to 3,000 in mileage increase 1,00,000.
Value of car decreased from 3,000 to 2,000 in mileage increase 1,20,000.
Question 6.
On which day did Caroline do the most driving?
Answer:
On Thursday Caroline did the most driving because most money spent on gas is on that day than other days.
Explanation:
Money spent on gas by Caroline on Monday = $30.
Money spent on gas by Caroline on Tuesday = $20.
Money spent on gas by Caroline on Wednesday = $30.
Money spent on gas by Caroline on Thursday = $60.
Money spent on gas by Caroline on Friday = $20.