Answer:
$420
Input: number of days
Output: Earnings
Step-by-step explanation:
Addison earns $35.00 per lawn and she mows two lawns per day. So, she will earn $35.00 times 2 per day:
Earns per day = $35.00 x 2 = $70.00
Now, if she earns $70.00 per day, and she spends six days mowing, we can calculate how much money he will earn using the following equation:

Where Y is the total earnings and X is the number of days.
So, the input is the number of days X and the output is the total money that he will earn Y.