3. In a running race, the times of 80 competitors were recorded. Complete the cumulative frequency table. Draw a cumulative frequency graph of the data. Using the graph estimate the median time. Time t (minutes) Frequency Cumulative frequency 30 < t < 35 7 35 < t < 40 13 40 < t < 45 18 45 < t < 50 25 50 < t < 55 12 55 < t < 60 5

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.

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step-by-step explanation:

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step-by-step explanation: