Question

juan repairs 4 types of electronic devices in his repair shop. the number of each type that he repaired last week is shown in the bar graph below. using this bar graph, answer the questions.
(a) which type of device did juan repair the least often?
telephone computer radio television
how many repairs on that type of device did juan make?
(b) how many more telephones than radios did juan repair?
(c) on how many types of devices did juan perform more than 6 repairs?

Explanation:

Step1: Identify least - repaired device

From the bar - graph, we see the height of the bar for television is the shortest.

Step2: Find number of television repairs

The height of the television bar is 4, so the number of television repairs is 4.

Step3: Find number of telephone and radio repairs

The height of the telephone bar is 10 and the height of the radio bar is 6.

Step4: Calculate difference between telephone and radio repairs

$10 - 6=4$.

Step5: Count devices with more than 6 repairs

Telephone (10 repairs) and computer (8 repairs) have more than 6 repairs, so there are 2 types.

Answer:

(a) 4
(b) 4
(c) 2