Question #4
The food bank is buying gallons of milk. The function f(x) = 3x represents the number of gallons of milk needed for x families. How many gallons of milk are needed for 7 families?
10 gallons of milk
3 gallons of milk
21 gallons of milk
4 gallons of milk
3/7 gallons of milk
20 gallons of milk
18 gallons of milk
To find out how many gallons of milk are needed for 7 families, we substitute x=7 into the function f(x) = 3x.
f(7) = 3(7) = 21
Therefore, 21 gallons of milk are needed for 7 families.