Write the equation in slope-intercept form of the line that passes through the given point and has the given slope.
(4, -7); m = -1/4
a. y = -1/4x - 6
b. y = -1/4x - 8
c. y = -1/4x + 6
d. y = -1/ 4x + 8

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?