Determine which set of ordered pairs is a function.
a.
{(–1, 3), (1, 4), (–1, 5)}
b.
{(5, 3), (–6, 3), (–2, 4)}
c.
{(0.5, 1.6), (1, 1.75), (1.5, 2.3), (0.5, 3.6)}
d.
{(1, 2), (–5, 4), (3, 6), (–5, 2)}

B.  {(5, 3), (–6, 3), (–2, 4)}

Step-by-step explanation:

A relation is called function if for each input value there is only one output value,

In option A,

For -1 there are two values i.e. 3 and 5,

⇒ {(–1, 3), (1, 4), (–1, 5)} is not a function,

In option B,

There are only one output value for each input value,

⇒ {(5, 3), (–6, 3), (–2, 4)} is a function,

In option C,

There are two output values for 0.5 i.e. 1.6 and 3.6,

⇒ {(0.5, 1.6), (1, 1.75), (1.5, 2.3), (0.5, 3.6)} is not a function,

In option D,

There are two output values for -5 i.e. 4 and 2,

⇒ {(1, 2), (–5, 4), (3, 6), (–5, 2)} is not a function,

6,250

step-by-step explanation:

to get the area, multiply 360 by 160.(57,600)

to find out how many bags of fertilizer it will take, first figure out how many square feet one bag can hold. divide 1000 by 8(125) to get the unit rate(how many square feet one pound of fertilizer can hold)and multiply it by 50(6250). if i haven't made a mistake, that is the answer.

the answer is 8/21

hope this