Writing an Equation to Represent a Real-World Problem
Caitlin is designing a railing for a set of stairs. The railing Which function can represent the height, y, of the
will begin at a height of 36 inches and follow the slant of railing in inches according to the horizontal distance in
the stairs, which decreases 9 inches for every 12 inches, x, from the top of the stairs?
horizontal inches
y=-3x + 36
4.
O y=-3x + 36
36 in
© y = x + 36
y = 3x + 36