4 Part A
Tell whether y is directly proportional to z or not based on the data in the table.
10
15
20
Price, x
Tax, y
25
0.70
1.05
1.40
1.75

no
V
If so, find the constant of proportionality.
0.07
Part B
Write the direct proportion equation.

Y=0.07%

Nequalities usually have many solutions. As in the case of solving equations, there are certainmanipulations of the inequality which do not change the solutions. Here is a list of "permissible'' manipulations: Rule 1. Adding/subtracting the same number on both sides. Example: The inequality x-2>5 has the same solutions 
Hope I helped:)