Answer:
y=-3x+9
Step-by-step explanation:
Answer:

Step-by-step explanation:
Older Scale:

New scale:

Solving for a gives us: 
Step-by-step explanation:
Solving an equation for a variable means that we have to isolate the variable in the equation
Given equation is:

For isolating a, subtracting c from both sides

Subtracting b from both sides

Hence,
Solving for a gives us: 
Keywords: Equation, formula
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0.6 or 18/30 because 9 divided by 15 is .6