Functions and linear equations?

Question

Son was out of school and was given worksheets without any explanation.

complete each function table.  Identify the domain and range.

y = x -1

there is a table showing under x 1, 2, 3, 4

 

A different sheet shows to graph each equation.

y = x -2   they show a simple cross x and y graph

 

Not sure how to complete the work.  Please help.

Answer 1

y = x -1

there is a table showing under x 1, 2, 3, 4

domain  { all real numbers}

range  {all real numbers}

x             y = x - 1                   y

1            y = 1 - 1                   0

2            y = 2 - 1                   1

3            y = 3 - 1                    2

4            y = 4 - 1                    3

Answer 2

asu book store is selling shirts ,the set up fee is $150.00.the total cost to produce 100 shrits is $2000.00 the book store will sell the shirts for $25.00 how much is the bookstore paying for each shrits

Answer 3

x	0	1	2	3	4
y	7	8	9	1	2