Can someone help me please I will mark u brilliant

Find the slope and the y-intercept if there's one and the equation of the line given these two points( 3, 2) and( 3, -4)

Interest begins accruing the date of the transaction except for auto loans mortgages credit card cash advances credit card purchases

Aword processing program requires a 7- digit registration code made up of the digits 1,2,4,5,6,7 and 9 each number has to be used and no number can be used mor than once how many codes are possible