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Kitty [74]
3 years ago
5

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
Mathematics
1 answer:
Leviafan [203]3 years ago
5 0

Answer:

y = 36 - \frac{3}{4}x

Step-by-step 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 = -\frac{9}{12} ---- negative, because it decreases

Simplify

r = -\frac{3}{4}

So, the function is:

y = h + r * x

Where:

x \to distance from top

So, we have:

y = 36 - \frac{3}{4}x

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General Idea:

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