can anyone help and explain why this is either proportional or not? urgent!! (it needs an explanation too)

For the equation below, x is the input and y is the output. y = -4x + 3 if the input is -8, then the output is

50 ! pls ! 12.  building codes regulate the steepness of stairs. homes must have steps that are at least 13 inches wide for each 8 inches that they rise.

a. discuss how to find the slope of the stairs.
b. describe how changing the width or height affects the steepness of the stairs.

Read the equations in the table below. then drag a description of the situation and a table to represent each equation. indicate whether each of the relationships is proportional or non-proportional.