the graph shows the distance a car traveled y and x hours what is the rise over run value for the relationship represented in the graph. 20,30,1/20,1/30

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?