Which set of ordered pairs is a function? A.
{(2,1), (2,2), (3,4), (5,6)}

B.
{(1,2), (2,1), (3,2), (4,4)}

C.
{(-2,-1), (2,2), (3,4), (2,5)}

D.
{(3,2), (4,1), (3,5), (1,4)}

the system of inequalities is

step-by-step explanation:

step 1

find the equation of the dashed line

we have the points

(0,0) and (3,1)

the line passes through the origin, so, is a direct variation

find the slope

the equation of the dashed line is

the solution of the inequality a s the shaded area above the dashed line

therefore

the equation of the inequality a is

step 2

find the equation of the solid line

we have the points

(4,0) and (0,4)

find the slope

the equation of the solid line is

the solution of the inequality b s the shaded area below the solid line

therefore

the equation of the inequality b is

step 3

the system of inequalities is

c) yes, because of asa or aas