Answer:
14 weeks
Step-by-step explanation:
Simply divide 200 by 15, then round up because the answer should be a full week:
200 / 15 = 13.3333 ≈ 14 weeks
For an equation, let x be weeks passed and y be money left. Since the money is spent at a constant rate, the equation will have a constant slope, and the y intercept is 200, since at no money spent, Micah has $200:
y = -15x + 200
For a ratio table, it might look something like this:
weeks : money
0 : $200
1 : $185
2 : $160
3 : $145
