(100 pt. question & brainliest) to whoever can help me solve this (I’ve been struggling on this for quite a bit.)

Which of the following points is collinear with (-2,1) and (0,3)

Tickets to a science exposition cost $5.75 each for studentd and $7.00 for adults.how many students and adults went if the ticket charge was $42.75

Acomputer store buys a computer system at a cost of $370.80. the selling price was first at $ 618, but then the store advertised a 20 % markdown on the system. answer parts a and b. a. find the current sale price.