The scenario that matches with the linear relationship shown in the table is option 2:
"Shanna had $ 10 in her piggy bank and earned $ 5 each week in allowance"
You could see that I had $ 10 initially in week zero and every two weeks I had $ 10 more. Therefore it can be inferred that every two weeks has won $ 10, that is, $ 5 each week
An isosceles triangle is one having two of its sides equal.
If the equation is
(2 times 3^x)
Then the answer is d. (0,2)
This is because plugging x = 0 leads to y = 2 as shown below

31.578 % change from 25 to 18