Here is the velocity-time graph of a car a) Work out the average
for 40 seconds.
acceleration during the
40 seconds.

Give the units of your answer.

Velocity
(m/s)
b) Estimate the time during the
40 seconds when the
instantaneous acceleration
is equal to the
average acceleration
You must show your working
on the graph to get full marks.
Answer
seconds
Give your answer to
the nearest second.

step-by-step explanation:

f

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.

answer: about 22.67

step-by-step explanation: