50 ft because you times 20 by 40 then you divide by 100 because that is the total percent
First, set up a ratio:
![\frac{30}{100} = \frac{15,680}{x}](https://tex.z-dn.net/?f=%20%5Cfrac%7B30%7D%7B100%7D%20%3D%20%20%5Cfrac%7B15%2C680%7D%7Bx%7D%20)
The first fraction is the percentage (30% and
![\frac{30}{100}](https://tex.z-dn.net/?f=%20%5Cfrac%7B30%7D%7B100%7D%20)
are the same thing) and the second is the loan payment (which is equal to the 30 in the first fraction) over their annual income (
![x](https://tex.z-dn.net/?f=x)
).
First you divide $15,680 by 30, then multiply that quantity by 100. The value calculated then replaces
![x](https://tex.z-dn.net/?f=x)
in your second fraction:
Question 1:
Sub the coordinates in for x and y
Y=-6x + b
1=-6(-4) +b
1= 24 +b
-23=b
Final answer: Y=-6x -23
Repeat for question 2
Question 3:
Slope = y2-y1/x2-x1
8-11/2- -4
-3/6= -0.5
Slope is -0.5
Sub x and y into equation
Y=-0.5x +b
11=-0.5(-4) +b
11=2+b
9=b
Y=-0.5x +9
Repeat for question 4