Can you me solve this without a caucleter

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)

How does a low unemployment rate affect a nation's economy? a. the nation has a higher number of productive resources. b. the nation can spend more money on for unemployed people. c. the nation can save money by paying lower salaries to a large workforce. reset

How do i simply this expression (quadratic formula basis) on a ti-84 or normal calculator?