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Find the independent variable and dependent and write an equation (gr 9 hw) 1) To fix a car, Fix-it Auto charges a base fee of $20 plus $40 per hour. 2) The cost of a banquet at Jean's Banquet Hall is $450 for the rental of the hall and $15 per guest. 3) An author earns a royalty of $1.25 for each book sold. 4) Marie has $500 in her bank account. Each week she plans to deposit $20.

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Answer:

Step-by-step explanation:

Using the regression equation :

y = mx + c

y = dependent variable ; x = independent variable ; m = slope ; c = intercept

1.) base fee = $20 ; hourly charge = $40

Hourly charge = independent

Total charge = dependent

Total charge = 40x + 20

x = Number of hours

2.) rental fee = $450; charge per guest = $15

Total rental fee = dependent

Independent = $15 = charge per guest

Number of guest = x

Total fee = 15x + 450

3.)

Royalty earned = dependent variable

Cost per book = $1.25 = independent

Royalty earned = $1.25 * number of books

4.)

Amount deposited per week = $20 = independent variable

Amount in account = dependent variable

y = 500 + 20x

x = number of weeks

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