Answer:
k = 3.5
Step-by-step 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 = [tex]\frac{28}{8}[/tex]
k = 3.5
k ≈ 3.5
Therefore, value of constant 'k' is 3.5
