So hmm notice the picture below
you have the center, and a point on the circle... all you need is the radius

then use that radius in the circle's equation
Answer:
y + 3 = -1(x-1)
Step-by-step explanation:
sub (1, -3) and slope = -1:
y - (-3) = -1(x - 1)
Topic: Coordinate Geometry
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Answer:
Step-by-step explanation:
The best way to answer this would be making a graph
For 1 sign it costs 54.50 and he makes 15
For 2 signs it costs 59 and he makes 30
For 3 signs it costs 63.50 and he makes 45
For 4 signs it costs 68 and he makes 60
For 5 signs it costs 72.50 and he makes 75
This means that after 5 signs Larry will be making profit