Help please anyone thank you

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.

Which is the equation of a line perpendicular to the line with the equation 3x+4y=8

Which of the following represents the range of the graph of f(x) below