Q. For a given input value x, the function f outputs a value y to satisfy the following equation.−5x−4y=−8Write a formula for f(x) in terms of x.f(x)=
Isolate variable y: Isolate the variable y in the equation −5x−4y=−8 to solve for f(x) in terms of x.We add 5x to both sides of the equation to get −4y=5x−8.
Divide by ext{−4}: Divide both sides of the equation by ext{−4} to solve for ext{y}.Doing this, we get ext{y} = \frac{(5 ext{x} - 8)}{ ext{−4}}.
Simplify equation for y: Simplify the equation for y.We can simplify the equation to y=−45x+2, since dividing both terms by −4 gives us y=−45⋅x+48.
Write function f(x): Write the function f(x) in terms of x.Since y is the output of the function f for the input x, we can write f(x)=−45x+2.
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