What are the slopes of line a and line b? look at the picture

we can mark points on the graph shown , check the image I have shared with this for the points .

Formula for slope =

So for Line A points are (1,3) and (0,-1)

So using t he formula slope is =

                  slope of line A =4

For Line B the points are  (0,4) and (3,-5)

So using t he formula slope is =

                  slope of line B = -3

center (1,3) with radius 6

step-by-step explanation:

we must complete the square to find the center and radius of the circle.

first make sure the x and y squared terms have 1 as their coefficients. we also make sure x and y terms together.

we now create space between the x and y terms with parenthesis.

we complete the square by taking the middle terms -2x and the -6y - divide each and square them.

we add the squares to both sides.

simplify.

and write the quadratics in factored form.

the center is (h,k) or (1,3). the radius is the square root of 36 which is 6.