A linear function is given by the equation y=4x. Using the points x and x+1, 0 show that the y-values increase by 4 between any two points separated by x2−x1=1

Question

please help

Answer 1

let f(x) = 4x
f(x+1) = 4(x+1) = 4x + 4

so the difference between the y values for consecutive x's
y₂ - y₁
= f(x+1) - f(x)
= 4x + 4 - 4x
= 4
what does my result show?