Your insight that the function values differ by 5 every time is very important. So your f(x) will contain 5x as a term. You have to find a constant to add or subtract to make sure f(1)=-2.
f(x) = 5x-7 does the job.
Answer:
x ≥ 56
Step-by-step explanation:
The whole problem will have to equal at least 120. If Xander has already collected 64, then he has a certain number of cans, x, remaining to collect. Since the problem is saying he needs "at least 120" then x and 64 must have a sum of at least 120. Thus you set up the problem like:
x + 64 ≥ 120
You can solve this simply by subtracting 64 from both sides.
x + (64-64) ≥ (120-64)
That would leave us with the answer:
x ≥ 54
Hope this helps!
