Find y when x=5, if y varies directly as x and y= 5 when x=3.5

3.5

Step-by-step explanation:

In variation, and from the above question,

y ∞ x ,

y = kx , where k is the constant of proportionality

first find the constant k

5 = 5k

Therefore

k = 1

Now to find y , substitute for k and x in the first equation above

y = kx

y = 1 x 3.5

y = 3.5

72 fudge and 75 toffee

step-by-step explanation:

i hope this : )

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.