Identify the relation that is also a function.
a.
{(5, 4) (5, 1) (5, 3) (0, 5)}
b.
{(0, -1) (1, -2) (2, -3) (-1, 2)}
c.
{(1, 0) (2, 3) (3, -1) (1, 5)}
d.
{(4, 2) (4, -3) (9, 3) (9, -3)}

Diane owes $387 to her brother. if she debits her bank account $161.25 a month to pay him back, how many months will it take her to pay off the debt?

Mat bought a phone for $100. he has to pay $30 per mouth. if he has paid $640 in total, how many mouth has he had the phone?

Select all the correct locations on the table. consider the following expression. 76.493 select "equivalent" or "not equivalent" to indicate whether the expression above is equivalent or not equivalent to the values or expressions in the last column equivalent not equivalent 343 equivalent not equivalent 49 78.498 78.498 75.493 equivalent not equivalent 75.7 equivalent not equivalent