Two different age groups were surveyed about the amount of time they spent on social media.
The results are shown in the two frequency
polygons below. The same time intervals were
used for both graphs.
11-year old students
15-year old students a) How many 15-year old
80
801
students took part in
70
70
the survey?
60
60
(1)
50
50
b) How many more 15-year
740
&40
old students than 11-year
30
30
old students spent
20 |
20
between 35 and 45 mins
10
10
on social media?
0
0
0 10 20 30 40 50 60 70 80 0 10 20 30 40 50 60 70 80
(1)
Time (mins)
Time (mins)
Total marks: 2
Frequency

because they could drop even lower..

answer: the price of one pound cabbage = $ 0.8

the point (10,8) represents that the cost of 10 pounds cabbage is $ 8

step-by-step explanation:

since, here is a proportional relation between the number of pounds of cabbage (x) and the price in dollars (y).

therefore, we can write,

⇒ y = k x

where k is the constant of proportionality.

now, point (5,4) is in the line.

thus, it will satisfies the above equation of line.

⇒ 4 = 5 k

⇒ k = 0.8

thus, the equation of the line is,

y = 0.8 x

a) for x = 1,

y = 0.8

therefore, the cost of one pound of cabbage is 0.8 dollars.

b) in the below graph (10,8) represents that the cost of 10 pounds of cabbage is 8 dollars.

their is no graph showing

step-by-step explanation:

step-by-step explanation: