It would be +700, because it's an increase. :)
Point-slope form for a line:
We need a point (x₀,y₀) and the slope (m).
y-y₀=m(x-x₀=
We have the point (-7,2) and the slope (m=6); so:
y-2=6(x+7)
Answer: the equation in point-slope form would be: y-2=6(x+7)
Area would be 4.52 A= pi x radius squared
Circumference would be 7.54 C= 2 pi radius. Hope that makes sense.