What are the slope and y-intercept of the graph of y = −1/3x + 1 ? a. slope: -1/3 ; y-intercept: 1 b. slope: 1/3 ; y -intercept: -1 c. slope: 1 ; y-intercept; -1/3 d. slope: 1/3 ; y-intercept: 1

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?