Plot 9, 2, and -4 on the number line line. Help pls

(a) (8%) compute the probability of an even integer among the 100 integers 1! , 2! , 3! , until 100! (here n! is n factorial or n*(n-1)*(n-2) *… 1) (b) (16%) compute the probability of an even integer among the 100 integers: 1, 1+2, 1+2+3, 1+2+3+4, …., 1+2+3+… + 99, and 1+2+3+… + 100

Which is the equation of a line perpendicular to the line with the equation 3x+4y=8

Tom drove 206 miles in 3.9 hours. estimate his average speed.