SOLUTION: I was givien the following problem: Write the equation 2x+3y=9 in function form and find f(-1) and f(6)

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Question 212059: I was givien the following problem:
Write the equation 2x+3y=9 in function form and find f(-1) and f(6)
Answer by drj(1380) About Me  (Show Source):
You can put this solution on YOUR website!
I was givien the following problem:

Write the equation 2x+3y=9 in function form and find f(-1) and f(6)

Step 1. Solve for y, such that y=f(x) where f(x) is a function of x.

Step 2. Subtract 2x in both sides of equation

2x%2B3y-2x=9-2x

3y=9-2x

Step 3. Divide 3 in both sides of equation

3y%2F3=%289-2x%29%2F3

y=3-2x%2F3

y=f%28x%29=3-2x%2F3

Step 4. f(-1) implies x=-1

y=f%28-1%29=3-2%28-1%29%2F3=3%2B2%2F3
y=f%28-1%29=9%2F3%2B2%2F3=11%2F3

Step 5. f(6) implies x=6

y=f%286%29=3-2%286%29%2F3=3%2B2%2A2=7

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