Add or Subtract as Indicated

question 409

Multiple Choice

Add or subtract as indicated.
- -15-(-6)

• A) 9
• B) -9
• C) -21
• D) 21

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Definitions:

Horizontal Line Test

A method used to determine if a function has an inverse that is also a function, based on whether any horizontal line intersects the graph more than once.

Inverse Function

A function that reverses the operation of a given function, such that the composition of the two yields the original input.

Function

A framework involving a set of inputs and a roster of potential outputs, with the stipulation that each input is corresponded with only one output.

Composition

The combining of distinct parts or elements to form a whole, especially in mathematics where functions are combined.