9 Find a function formula whose graph is described below a T

(9) Find a function formula whose graph is described below:

(a) The line segment joining the points (-3, -2) and (6, 3)

(b) The bottom half of the circle x squared + y squared = 16

a)(x₁,y₁)=(-3 , -2),(x₂,y₂)=(6 , 3) equation of line in 2 point form is y-y₁=[(y₂-y₁)_/(x2-x1)]*(x-x₁)

y-(-2)=[(3-(-2))_/(6-(-3))]*(x-(-3))

y+2=[5_/9]*(x+3)

9(y+2)=5(x+3)

9y+18 =5x+15

5x-9y=3

equation of line joining given points is 5x-9y=3

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b)x²+y²=16

y²=16-x²

y=-(16-x²)

equation of function of bottom half of the given circle is y=-(16-x²)