Graphs in practical situation

Question 1

How is a linear function represented graphically

Answer 1

It is represented as a straight line graph

Question 2

How are linear graphs useful?

Answer 2

It allows us to find the values of variables that are related to each other

Question 3

What are conversion graphs?

Answer 3

Conversion graphs are linear graphs connecting two quantities which are in direct proportion

Question 4

Use the S$ Euro graph to

Find the amount S$ you get in exchange for Euro$200

Answer 4

Draw a vertical line from Euro 200 until it touches the line, then draw a horizontal line to determine S$ amount

S$300

Question 5

Use the S$ Euro graph to

Find the amount Euro$ you get in exchange for S$450

Answer 5

Draw a horizontal line from S$450 until it touches the line, then draw a vertical line to determine Euro$ amount

Euro$300

Question 6

Use the S$ Euro graph to

Find the amount Euro$ you get in exchange for S$600

Answer 6

Draw a horizontal line from S$600 until it touches the line, then draw a vertical line to determine Euro$ amount

Euro$400

Question 7

Use the S$ Euro graph to

Find the amount S$ you get in exchange for Euro$100

Answer 7

Draw a vertical line from Euro 100 until it touches the line, then draw a horizontal line to determine S$ amount

S$150

Question 8

Use the Fahrenheit and Celsius graph to

find the value of 50°F in Celsius

Answer 8

Draw a horizontal line from 50ºF until it touches the line, then draw a vertical line to determine the celsius rate

10ºC

Question 9

Use the Fahrenheit and Celsius graph to

find the value of 30°C in Fahrenheit

Answer 9

Draw a vertical line from 30ºC until it touches the line, then draw a horizontal line to determine the Fahrenheit rate

85ºF

Question 10

Use the Fahrenheit and Celsius graph to

find the value of 20°C in Fahrenheit

Answer 10

Draw a vertical line from 20ºC until it touches the line, then draw a horizontal line to determine the Fahrenheit rate

68ºF

Question 11

Use the Fahrenheit and Celsius graph to

find the value of 70°F in Celsius

Answer 11

Draw a horizontal line from 70ºF until it touches the line, then draw a vertical line to determine the celsius rate

21ºC

Question 12

Use the km to mile graph to

find the value of 2 miles in km

Answer 12

From 2 to 4 km, there are 5 boxes

so 1 box is 0.4 km

2 miles is 3.2 km

Question 13

Use the km to mile graph to

find the value of 6 km in miles

Answer 13

From 1 to 2 miles, there are 5 boxes

so 1 box is 0.2 miles

6 km is 3.8 miles