Question

Which function can represent the height, y, of the railing in inches according to the horizontal distance in inches, x, from the top of the stairs? y = –StartFraction 3 Over 4 EndFractionx + 36 y = –3x + 36 y = StartFraction 3 Over 4 EndFractionx + 36 y = 3x + 36

Answer 1

Answer: its A

Explanation:

the one mrroyal wrote is difficult to find but your answer is A y = –StartFraction 3 Over 4 EndFractionx + 36

Answer 2

`y = 36 - (3)/(4)x`

Explanation:

The missing parameters are:

`h = 36in` --- height of rails

The rate of decrement is: 9
`inches` for
`every` 12
`horizontal`
`inches.`

Required

The function

First, we represent the rate (r) as a fraction.

`r = -(9)/(12)` ---- negative, because it decreases

Simplify

`r = -(3)/(4)`

So, the function is:

`y = h + r * x`

Where:

`x \to` distance from top

So, we have:

`y = 36 - (3)/(4)x`