12 hours worth $87
1 hour would be $87/12 = $7.25
9 hours worth $65.25
1 hour would be $65.25/9 = $7.25
The constant of proportionality is $7.25 per hour.
Answer:
- 2730.54
- 18.8%
- 62.5% (decrease)
Step-by-step explanation:
The applicable formula is ...
rate = portion/base
so ...
base = portion/rate
Of course, a percentage is a fraction that has been multiplied by 100%.
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1. base = portion/rate = 456/0.167 ≈ 2730.54
The base is about 2730.54.
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2. rate = portion/base = 50/266 ≈ 0.18797 ≈ 18.8%
The rate is about 18.8%.
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3. The decrease can be figured from ...
rate of change = (new amount)/(original) -1 = 33/88 -1
= -5/8 = -0.625 = -62.5%
The rate of decrease is 62.5%.
I think it is -5.9. Sorry if I'm wrong.
Notice those two points on the "linear graph", the first point is at (1965 , 140) and the second point is at (1990 , 100).
the rate or average rate of change, namely the slope will then be
Easy,
split them up,
-4(-11+4n)=
=44-16n
then
-3(-2n+9)=
=6n-27
Making it, 44-16n+6n-27, add your apples and oranges
-16n+6n=-10n
44-27=17
-10n+17.
Thus, this is your answer.
