Adescription of different houses on the market includes the following three variables. which of these variables is quantitative? a. the square footage of the house. b. the monthly gas bill. c. the monthly electric bill. d. all of the above.

Step-by-step explanation:

D.All of the above

The linear equation represents y = mx + b describes several real world situations such as

Relation between printer and ink cartridges, Relationship between number of songs and how much is left on the card.

Step-by-step explanation:

Linear equations  y = mx + b.  

m is your rate of change.

b is your constant. This is the initial value of y. The value of y when x is 0.

Finally, y is the thing that depends on x.

Oh right, examples:  

 I buy a printer for $100 and the ink cartridges cost $25 each. The relationship between ink cartridges and total cost.

total cost = 25(cartridges I buy) + 100 or y = 25x + 100

I get a $100 iTunes gift card for my birthday and then start buying $1 songs. The relationship between the number of songs I buy and how much is left on the card

amount left on card = -$1(songs bought) + 100 or y = -x +100