Domain -1,4,5,3,-5 range n, w,y, n,w is this a function

The last time i bought this product , it cost $20.00 but it looks like it cost 29. 60 today? what is the increase

Idon't get undoing if its pass adding and subtracting so can someone ? x-2 over 5 = 18

Traffic on saturday, it took ms. torres 24 minutes to drive 20 miles from her home to her office. during friday's rush hour, it took 75 minutes to drive the same distance. a. what was ms. torres's average speed in miles per hour on saturday? b. what was her average speed in miles per hour on friday?