The set of valid inputs for a function is called the the letter a in parentheses above a horizontal line. (a) , and the input variable x is called the the letter b in parentheses above a horizontal line. (b) variable.

  (a)  domain

  (b)  "argument," or "independent variable"

Step-by-step explanation:

You may want to refer to your notes for terminology related to functions. Different terms are used, depending on the context.

__

The set of valid inputs for a function is called the domain.

__

The input variable x is called the argument, or independent variable.

15

step-by-step explanation:

we are given the following expression and we are to solve it and find the product:

-13 × (-5)

solving the given expression in the standard order of solving a mathematical expression, beginning with the opening of brackets and then multiplying the terms and changing their signs.

-3 × -5 = 15 (answer is positive because when negative is multiplied with negative, it gives a positive answer)

part a

x     y

0     8

1     7.5

2     7

3     6.5

4     6

5     5.5  

for every hour i deducted .5 inches from the length of the candle

part b

it is a function because for every x value there is only one y value

part   c

for every x value there is only one y value

x       y

0       8

1       7.6

2       7.2

3       6.8

step-by-step explanation: