Question

Calories Used While Swimming for 30 Minutes
Type of Stroke
56-kg woman
77-kg man
Backstroke
95
130
Breaststroke
91
125
Fast Crawl
87
120
Slow Crawl
95
130
Sidestroke
68
90
Treading Water
35
48
Table 2-1

Which variable mentioned in Table 2-1 is kept constant?
a.
amount of time spent swimming
b.
type of swimming stroke
c.
number of calories used
d.
the person swimming

Answer 1

In the table, the variable that is kept constant is a) the amount of time spent swimming, which is 30 minutes.

All the other variables in the table are illustrations of the amount of calories used up when one swims for 30 minutes.

The table can be interpreted as follows:
-For every 30 minutes the amount of calories used is:

Type of Stroke

56-kg woman......this is 56 kg woman
77-kg man   ........this is 77 kg man

Backstroke

95.......95 calories during the 30 minutes when using back stroke for the woman
130.....130  calories ''          ''           ''                    ''                '' for the man

Breaststroke
91.........91 calories in the 30 minutes using breaststroke - 56 kg woman
125........125 calories in the 30 minutes using breaststrokes- 77 kg man 

Fast Crawl
87     .........87 calories in the 30 minutes using Fast crawl for 56kg woman
120 .......... 120 calories in the 30 minutes using Fast crawl for 77kg man

Slow Crawl
95      ......95 calories in the 30 minutes for the 56 kg woman
130..........130 calories in the 30 minutes for the 77 kg man

Sidestroke
68  .......... 68 calories in the 30 minutes for the 56 kg woman
90.............90 calories in the 30 minutes for the 77 kg man

Treading Water
35..........35 calories in the 30 minutes for the 56 kg woman
48 .........48 calories in the 30 minutes for the 77kg man

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