We first get rid of the fraction by multiplying both sides by 10
this gives us: -70+10x=x-160
subtract x from both sides
this gives us: =-70+9x=-160
add 70 to both sides
this gives us 9x=-90
divide both sides by 9
this gives us x=-10
You're very close. However, the less steep line should go through (4,7) and not some point slightly above that location. Also, the shaded region should be above both dashed lines at the same time. So you won't include the portion that I've marked in blue (see attached). Other than that, it looks great.
The slope is 6 hope this help
The length of the diagonal line is 191 meters.
135² + 135² = c²
18225+18225 =c²
√36450 = √c²
190.91 = c
Round to the nearest meter = 191 meters
I believe it is 9/12x + 12