Determine which relation is a function.
a.
{(–3, 2), (–1, 3), (–1, 2), (0, 4), (1, 1)}
b.
{(–3, 3), (–2, 3), (–1, 1), (0, 4), (0, 1)}
c.
{(–3, 2), (–2, 3), (–1, 1), (0, 4), (0, 1)}
d.
{(–3, 2), (–2, 3), (–1, 2), (0, 4), (1, 1)}

pooopoopopoopop

step-by-step explanati∵∵∴∴on:

x = ±sqrt(10)

step-by-step explanation:

5 - 2x² = -15

subtract 5 from each side

5-5 - 2x² = -15-5

-2x^2   = -20

divide by -2 on each side

-2x^2   /-2= -20/-2

x^2 =10

take the square root on each side

sqrt(x^2 )=±sqrt(10)

x = ±sqrt(10)

check:

5 - 2x² = -15

+sqrt(10)

5 - 2(sqrt(10))² = -15

5 -2(10) = -15

5 -20 = -15

-15 = -15

-sqrt(10)

5 - 2(-sqrt(10))² = -15

5 -2(10) = -15

5 -20 = -15

-15 = -15