Question

Write an exponential function for the value, y, after x years

Answer 1

Explanation:

Step 1: Set x equal to 0 to find the y-int

`y = 10000(1 - 0.40)` → Not an exponential equation

`y=10000(1-0.40)^0` → 10,000 → Works for first test

`y = 10000(1-0.60)^0` → 10,000 → Works for first test

`y = 10000(1+0.40)^0` → 10,000 → Works for first test

Step 2: Set x equal to 1

`y=10000(1-0.40)^1` → 6,000 → Works for second test

`y = 10000(1-0.60)^1` → 4,000 → Does not work for the second test

`y = 10000(1+0.40)^1` → 14,000 → Does not work for the second test

Answer: The answer is Option B