Keith should have subtracted 5 from each side so option (D) will be correct.
What is a function?
A certain kind of relationship called a function binds inputs to essentially one output.
In other words, the function is a relationship between variables, and the nature of the relationship defines the function for example y = sinx and y = x +6 like that.
The machine will only accept specified inputs, described as the function's domain, and will potentially produce one output for each input.
Given
f(x)=7x+5
step 2 ⇒ Change f(x) to y
y=7x+5
step 3 ⇒ Exchange x for y and y for x
x=7y+5
step 4 ⇒ Subtract 5 on each side
x-5=7y+5-5
x-5=7y
Step 4 is not correct
step 5 ⇒ Divide by 7 on each side
(x-5)/7=y
step 6 ⇒ Change y to g(x)
(x-5)/7=g(x)
step 7 ⇒ switches sides of the equation
g(x)=(x-5)/7
so,
In step 4 Keith should have subtracted 5 from each side
For more about the function
brainly.com/question/23712366
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