What is the slope of a line perpendicular to the line y = -3x + 9?

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Perpendicular lines have slopes that are opposite reciprocals.

This means you take a number, flop it over, and make it negative.

The opposite reciprocal of -3 is

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A) radius= 4 units

b) (x+5)^2+(y-3)^2=4^2

The distance between the x values in the center point and a point included in the graph will give you the radius.
The x values are 4 units apart (-5 to -1) so your radius is 4 units

Circle formula:
(x-h)^2+(y-k)^2=r^2
Where (h,k) is the center point and r is the radius

Replace h with -5, k with 3, and r with 4 to get equation listed in answer above

Hope this helps!!