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What is the equation of this graphed line? enter your answer in slope-intercept form in the box.

If y varies directly as x2 and y=6 when x=6, find the constant of variation.

Jada has a meal in a restaurant she adds up the prices listed on the menu for everything they ordered and gets a subtotal of $42.00. when the check comes, it says they also need to pay $3.99 in sales tax. what percentage of the subtotal is the sales tax