Answer:
Step-by-step explanation:
The best answer is C. She solved 4 problems and began working on the 5th one. The equation is y = x + 4. So when x is 0, the answer is 4. That's when the timing began.
A: not A. A is a subtraction problem, but that is not what is happening. She started with 4 dollars in her change jar and added 1 dollar each week.
B: not B. If she ran 4 miles each week, the equation would be y = 4x.
D: same as B. The equation is 4x again.
