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A transformation translates the point of S(-1,1) down 2 units and right 3 units. What rule describes this translation?
(x, y)-->(x-2,y+3)
(x, y)-->(x+2,y-3)
(x, y)-->(x-3,y+2)
(x, y)-->(x+3,y-2)

Aparticular telephone number is used to receive both voice calls and fax messages. suppose that 25% of the incoming calls involve fax messages, and consider a sample of 25 incoming calls. (a) what is the expected number of calls among the 25 that involve a fax message?