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Question: The amount spent by Chris on a birthday party is a function of number of his friends whom he invited. Which of the following is a dependent variable?


A ) Chris′s age
B ) number of members in Chris′s family
C ) number of friends Chris invited
D ) amount spent by Chris on the party

Steps to derive

1 Independent variable is the input and the dependent variable is the output of the situation.

2 From the given function, independent variable is the number of friends and the dependent variable is amount Chris spent.

3 Among the choices, "amount spent by Chris on the party" is dependent variable.



Hence the right answer is Option D

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