## gdogthegirl Group Title Help please!? The sales tax on a new car varies directly to(or is directly proportional) the price of the car. If $1,800 in sales tax is paid for a$25,000 car. what is the purchase price of a car worth \$1,600 in sales tax? Im totally lost when it comes to variations :( 2 years ago 2 years ago

1. bwtOrlando

it just means that it is a fixed ratio. interest/price is fixed regardless of price

2. bwtOrlando

$so \frac{ 25000 }{ 1800}=\frac{ x }{ 1600 }$

3. gdogthegirl

i have to use the formula of y+kx squared to n to find it

4. gdogthegirl

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