Answer:

Step-by-step explanation:
y = 
Use (0, -3) to find k

So, k = -3
Now use (4, -48) to find b
-48 = 
= 16
b = 2
Since k = -3 and b = 2, 
Answer:
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Step-by-step explanation:
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tangent 60 is √3 on the unit circle and tangent 225 is 1. So 1+√3 is the exact value of tan 60 plus tan 225