The answer should be 0.422
Answer:

Step-by-step explanation:
We are given that DE

We have to determine given DE is exact or not.
Compare it with Mdx+Ndy=0





Therefore, 
If DE is exact then 
Hence,it is exact.

Integrate w.r.t x on both sides

...(1)
By using the formula

Differentiate partially equation (1) w.r.t y

By using the formula:




Integrate w.r.t y

Substitute the value

Answer:
slope 1/7
y intercept: (0, -67)
slope intercept form: y=1/7x - 61/7
Step-by-step explanation:
point slope form is
y+9=1/7 *(x+2)
1080 dollars I would say.