Question

answer the questions below.
(a) a used car dealer is examining how the price at which a car can be sold varies with the cars mileage. what is the independent variable in this relationship?
○ cars mileage
○ cars price
(b) a function tells how to compute the output l when the input r is given. which is the dependent variable for this function?
○ r
○ l
(c) linda has a part - time job entering data in a computer. her pay at the end of the week is affected by the amount of data she enters each hour. what is the dependent variable?
○ pay at the end of the week
○ amount of data entered

Explanation:

(a) The independent variable is the factor that is manipulated or stands alone; here, mileage affects price, so mileage is independent.
(b) In a function, the dependent variable is the output that depends on the input; L is the output from input R, so L is dependent.
(c) The dependent variable is the value affected by another; pay is affected by data entered, so pay is dependent.

Answer:

(a) car's mileage
(b) L
(c) pay at the end of the week