Please help me with this

y=2x-1

Step-by-step explanation:

first you write out your equation, y=mx+b

then you fill out what you know, 7=m4+b

you find the slope, the formula is y-y/x-x you plug in the numbers, 7-3/4-2 you get 2 which is your slope, m

then you slove for b, 7=2x4+b, b=-1

you write the equation y=2x-1

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.