Jonah weighs his puppy each week. The puppy has a mass of 10 kilograms the first time Jonah weighs it. The mass of the puppy increases
0.5 kilograms each week until it is fully grown. For each of the answer options, let y represent mass in kilograms, and x represent time in
weeks.
Which equation shows a smaller rate of change than Jonah's puppy?
O A. y = 0.4x + 10
OB. y=0.5x + 9
OC. y = 9x +0.5
D. y = 10x +0.4