answer: the price of one pound cabbage = $ 0.8
the point (10,8) represents that the cost of 10 pounds cabbage is $ 8
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.
its kind of blurry. can you put a clearer pic?