Çözüldü Linear Function (8th Grade)

From Rhode Island Department of Education, Grade 8, Spring 2025, Official Mathematics Test:

A student recorded the weight of a puppy each week for several weeks after the puppy was born. This equation models y, the weight, in pounds, of the puppy x weeks after it was born.
y = 0.25x + 1
Based on the model, which of the following sentences is true?

A) The puppy gained 1 pound per week.
B) The puppy ate 1 pound of food per week.
C) The puppy reached a final weight of 1 pound.
D) The puppy weighed 1 pound when it was born.

y = f(x) = 0.25x + 1 ⇒ f(0) = 0.25·0 + 1 = 0 + 1 = 1 pound ====> Choice D.

Notes:
1. When it was born, x was 0.
2. The test booklet is attached
[Page 13 (15 in the pdf file), Question 10]