Answer:

Step-by-step explanation:
From the question we are told that
February Heat
February Gas 
April Heat
April Gas 
Generally equation for heating degree-days X is mathematically given by



Generally the equation for gas bill Y is mathematically represented by

The equation representing the relationship between the gas bill (Y) and heating degree-days (X) is

Answer:
1/9
Step-by-step explanation:
You combine the fractions finding the least common denominator. Once you do that, you get your answer of 1/9.
I hope this information was of any use to you.
3 terms
https://youtu.be/0sq2PMQ_Nak
use that video to help you.
This is a proportion problem.
Let's make her Length x and her height 1/3 x.
1/3 x = 20 inches
x = 6 2/3 inches
Molly's height is 6 2/3 inches.
Check it.
6 2/3 x 3 = ? (change the mixed number to a fraction)
20/3 x 3 = ? (multiply)
60/3 = ? (divide)
20 inches. Yes, it checks.
Answer: the first one is exponential and the second one is function