Can someone please tell me which of these graphs represent a function?

Someone answer asap for ! the following statements are true about the coins calvin and sasha have collected. * calvin and sasha has the same amount of money. * calvin has only quarters. * sasha has dimes, nickels, and pennies * calvin has the same number of quarters as sasha has dimes. * sasha has $1.95 in coins that are not dimes. exactly how many quarters does calvin have?

Find the value of x for which line a is parallel to line b

If on=8x-8,lm=7x+4,nm=x-5,and ol=3y-6