Which relations are functions and which are not functions?
column a column b
1.
{(3, 7), (3, 6), (5, 4),
(4, 7)}
2.
{(1, 5), (3, 5), (4, 6),
(6, 4)}
3.
{(2, 3), (4, 2), (4, 6),
(5, 8)}
4.
{(0, 4), (3, 2), (4, 2),
(6, 5)}
a.
function
b.
not a function

an altitude of 15,000 feet

step-by-step explanation:

to find the perimeter of the rectangle this is the expression:

x-9+x-9+3x-4+3x-4=138

if we simplify it:

8x-26=138

remember, 138 is what it all adds up to

the length is 11.5cm

the width is 57.5cm

the area is 661.25cm^2

the answers might not be correct use at own risk