Let a = r−{0}, the set of all nonzero real numbers, and consider the following relations on a × a. decide in each case whether r is an equivalence relation, justifying your answers. in the case that r is an equivalence relation, find the equivalence classes. (a) (a, b)r(c, d) if and only if ad = bc

Guys i need ! graded assignment grade 8 checkpoint 2, part 2 answer the questions below. when you are finished, submit this assignment to your teacher by the due date for full credit. total score: of 9 points (score for question 1: of 4 points) 1. the cost of renting a car for a day is $0.50 per mile plus a $15 flat fee. (a) write an equation to represent this relationship. let x be the number of miles driven and y be the total cost for the day. (b) what does the graph of this equation form on a coordinate plane? explain. (c) what is the slope and the y-intercept of the graph of the relationship? explain.