5. (8 points) Graph each line and specify the slope and y-intercept. Clearly label at least two points on each graph. a y = 5x -1 (b) r= -3 6. (10 points) A 6-digit passcode is required to unlock your new iPhone 13 Pro that costs a lot of money. How many passcodes are possible if: (a) no restriction is placed on the digits? (b) none of the digits can be repeated? 7. (10 points) Suppose a 7-person committee is to be formed from 15 teachers and 20 students. How many committees are possible if: (a) no restriction is placed on the digits? (b) the committee is to have 2 teachers and 5 students