Identify dependent & independent variables

Practice figuring out if a variable is dependent or independent.

Problem

You are buying boxes of cookies at a bakery. Each box of cookies costs dollar sign, 4. In the graph below, c represents the number of boxes of cookies you buy, and d represents the amount the cookies will cost you (in dollars).
The relationship between these two variables can be expressed by the following equation:
d, equals, 4, c.
Suppose you buy 12 boxes of cookies.
How much will the cookies cost you (in dollars)? dollar sign
  • Your answer should be
  • an integer, like 6
  • an exact decimal, like 0, point, 75
  • a simplified proper fraction, like 3, slash, 5
  • a simplified improper fraction, like 7, slash, 4
  • a mixed number, like 1, space, 3, slash, 4