actice Is the relationship between the values in each table a direct variation an inverse variation or neither Write equations to model the direct and inverse variations 6 3 15 622 8 10 50 110 7 10 z 1 when y 11 13 x 1 when y 5 16 x 20 when y 4 357 10 5 14 8 4 00504 6 8 Suppose that and y vary inversely Write a function that models each inverse variation Graph the function and find y when x 10 11 13 when y 100 14 x 12 when y 3 17 x 5 when y 0 5 1 21 42 35 7 11 22 a Write an equi b What volume is needed to store 5 moles or e 19 Fundraising In a bake sale you recorded the number of muffins sold and the amount of sales in a table as shown a What is a function that relates the sales and the number of muffins b How many muffins would you have to sell to make at least 250 00 in sales under the pressure 190 kPA c A 10 L cylinder is filled with hydrogen gas to a pressure of 5 000 KPA The temperature of gas is 300 K How many moles of hydrogen gas are in the cylinder 6 7 Write the function that models each variation Find zwhen x 4 and y 9 26 z varies directly with x and inversely with y When x 6 and y 2 z 15 2 and y 3 z 60 27 z varies jointly with x and y When x 28 z varies inversely with the product of x and y When x 2 and y 4 z 0 5 Each pair of values is from a direct variation Find the missing value 29 2 5 4 y 30 4 6 x 3 31 3 7 8 y Each ordered pair is from an inverse variation Find the constant of variation 33 6 3 34 0 9 4 35 3 12 x 1 when y 1 15 x 2 5 when y 100 18 0 1 3 36 See Problem 1 6 24 175 00 186 70 0 05 0 0125 See Problem 2 when y 105 See Problem 3 Number of muffins m 5 8 13 20 Sales s 12 50 20 00 32 50 50 00 80 75 32 x 12 4 1 5 36 V2 V18