Consider the function represented by the equation y – x  – 4 = 0. what is the equation written in function notation, with x as the independent variable?

The indepentent variable influences the dependent variable
the value of the depdendent variable is dependent on the value of the independent variable

y=f(x)
solve for y in terms of x

y-x-4=0
add x+4 to both sides
y=x+4
f(x)=x+4 is the answer

We need the pictures of the graphs

Horizontal change or the change of x