A is the correct answer to it.
The slope of it is 5/1 and if you start at -3 as that is your Y-intercept, the values add up
Multiply the numbers: 3 x 2=6 = 6x + 5 - 12x - 2 x 149x
Next Multiply the numbers 149 x 2 = 298
Then, Group like terms, =-6x-12x-298x+5
Add similar elements -6x-12x-298x=-316x,
and you get -316x+5!
Claire owed Martha $8 she originally owed Martha 12 but already gave her 4 this was a problem for Claire considering she only got $4 a week
600(1.5)(.12)
Multiply them all together...
=$108
She owes $108 in interest at the end of 1.5 years.