Which of these relations are​ functions? a
(4,4), (5,4),​ (6,4), (7,4),​ (8,4)
b
​(4,4), (5,6),​ (6,8), (6,10),​ (7,12)
c
​(7,33), (8,30),​ (9,27), (10,24),​ (11,21)
d
(6,9), (7,19),​ (8,29), (8,39),​ (9,49)

pls help me

solution:

→c= a b , that is product of a and b is possible only when when a is m × n matrix and b is n × p matrix.

that is, number of columns of a= number of rows of b.

so, size of matrix , c= a b is , if a = (m × n)matrix

b= (n × p)matrix

then a b = [ (m × n)matrix] ×[   (n × p)matrix ]

→→c= a b= [m × p ] matrix

→→size of product a b will be equal to = number of rows of a × number of columns of b

answer: -1

step-by-step explanation:

answer: 0,6

step-by-step explanation:

this would make it the y intercept.

sample answer: you can determine whether each element of the domain is paired with exactly one element of the range. for example, if given a graph, you could use the vertical line test; if a vertical line intersects the graph more than once, then the relation that the graph represents is not a function.