SOLUTION: Please help me help my daughter. She has 4 problems that involve prediction equations. We are NOT looking for the answer, but instead how to solve them ourselves. Example: This

Question 984528: Please help me help my daughter. She has 4 problems that involve prediction equations. We are NOT looking for the answer, but instead how to solve them ourselves. Example: This is her first problem:
A student who waits tables at a restaurant recorded the cost of meals and the tip left by single diners.
It has a table with meal cost listed and tip left amounts.
The cost of meals are labeled as the x variable. The tip is listed as the y variable.
She then has to solve for a given amount the tip that would be left.
Answer by ankor@dixie-net.com(22740) (Show Source): You can put this solution on YOUR website!
A student who waits tables at a restaurant recorded the cost of meals and the tip left by single diners.
It has a table with meal cost listed and tip left amounts.
The cost of meals are labeled as the x variable. The tip is listed as the y variable.
She then has to solve for a given amount the tip that would be left.
:
Are they assuming the amt of the tip is 10% of the cost of the meal?
If so the equation would just be
y = .10x
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