Polar coordinates of a point are given. find the rectangular coordinates of the point. (2.1 ; 2pi/9)

a. (-1.6, -1.3)
b. (1.6, 1.3)
c. (1.3, 1.6)
d. (-1.3, -1.6)

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.

i think the answer is b.

step-by-step explanation:

not 100% sure though.

answer:   c ?

step-by-step explanation: