The constant rate of change for the relationship shown in the table is $8 per hour. Find the missing values. x= y= z=

Time (h) 1 2 3
Earning ($) x y z

Frank has a devised a formula for his catering business that calculates the number of meatballs he needs to prepare. the formula is m=4a+2c, where c=number of children; m=number of meatballs; a=number of adults. how many meatballs are required for a party of 10 adults and 5 children?