Sofia Smith uses gas to heat her home. She has accumulated the following information regarding her monthly gas bill and monthly heating degree-days. The heating degree-days value for a month is found by first subtracting the average temperature for each day from 65 degrees and then summing these daily amounts together for the month.

Month	Heating Degree-Days	Gas Bill
February	850	$129
April	300	$52

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

1. Y = $0.14
2. Y = $10 + $0.14X
3. Y = $10 $0.14X
4. Y = $60 + $0.14X