Question: (b) The image below is a slope field for the differential equation - = a(y - b), where a and b are two real numbers.

(b) The image below is a slope field for the differential equation - = a(y - b), where a and b are two real numbers. Explain briefly whether a is positive or negative, and what the value of b is. You may assume b is an integer (in general reading off exact values from a slope field is not possible - the assumption is intended help you get an unambiguous answer)

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