Pretend these are coordinates that you can use to find the slope of the line.
(10, 40) and (15, 60). Fit these into the slope formula to find the slope of the line you are looking for:

and the slope is 4. Now use one of the points and the slope of 4 to solve for b, the y-intercept:
40 = 4(10) + b so b = 0. The equation of the line then is y = 4x + 0 or just
y = 4x
Answer:
$1,380 per year.
Step-by-step explanation:
Theres 12 months in a year so multiplying $115 by 12 will get you $1,380 because she pays $115 per month.
34/6. You do 5 x the 6, then add the 4