a) x = 25 tickets 
 y = 43.75 - Total cost 
 a = admission cost
b/c) 1.25(25)+a=43.75
 31.25+a=43.75
 43.75-31.25=12.50 cost of admission
 12.50+31.25=43.75 total cost at the country fair. 
(8,9) and (-2,4)
equation would be y = 1/2x+5
(do the work its a lot there can be videos found online)
nfadkjnbvjkn I'm busy i hope this helped