Which one of the following sentences has both a compound subject and a compound object?
a. helen and her children are going to the zoo.
b. amy and paul watched television before bed.
c. john and his wife danced and sang.
d. jane and liza love books and music.

A I think.  I'm not 100 percent sure tho 

I Am Not Sure But I Think It Is C or D. Even though every possible anwer has 2 or more people only C and D have to things to do. Or objects. But I Am Pretty Sure It Is D

The slope of a linear equation is equal to the change in the value of the dependent variable divided by the change in the value of the independent variable. in this problem, the dependent variable is the profit while the independent variable is the worker's average pay. if the profit is said to increase by 1500 when worker's average pay decrease by 450, the slope is equal to 1500/(-450)=-3.33