Iam giving a brainliest to the best answer

A

Step-by-step explanation:

Given

f(x) =

let f(x) = y and rearrange making x the subject

y = ( multiply both sides by 4 )

4y = x + 3 ( subtract 3 from both sides )

4y - 3 = x

Change y back into terms of x

(x) = 4x - 3 → A

i think it will be zero as slope has a formula of difference between initial and final distance divided by itz time interval