Shawn has a budget of $50 per month to spend on bus fare. he made a table showing the total amount of bus money he will have left after the given number of rides. number of rides 0 9 18 27 total amount of bus money left ($) 50 41 32 23 which equation, in standard form, represents the relationship between the number of bus rides, x, and the amount of bus money shawn will have left, y? 50x = y x + y = 50 50y = x