Question

Write an equation in the form of y=kx for the graph below. (k=y/x) K is in decimal
Form

Answer 1

k = 3.5

Explanation:

From the graph in the picture attached,

Relation between balloons height (y) is directly proportional to the time (x)

y ∝ x

y = kx

Where 'k' is a proportionality constant.

Now we substitute the point (8, 28) in the equation,

28 = k(8)

k =
`(28)/(8)`

k = 3.5

k ≈ 3.5

Therefore, value of constant 'k' is 3.5