(04.01 lc) of the following sets, which represents a function? (1 point) situation a = {student's name, the student's favorite color} situation b = {student's name, the student's favorite math teacher} select one: a. only a b. only b c. both a and b d. neither a nor b thx

c. Both A and B

A function is a mapping that maps each element of its domain (student's name) to exactly one element of its co-domain (favorite ...). Assuming student names are unique and the notion of "favorite" is exclusive (can't have two or more "favorites" of the same type), then both A and B describe mappings that are functions.

c. Both A and B

Step-by-step explanation:

A function means each input  goes to only one output.  As long as each student is only entered once,  and they only have one favorite color and one favorite math teacher, then A and B are functions.

nothjing

step-by-step explanation:

x = -3

y = -18

step-by-step explanation:

to solve by substitution, substitute one variable and solve for the other. then substitute again to find the remaining variable.

x-1/3(3x-9) = -3 since y=3x-9 substittute y.

x-1/3(3x-9)=-3

x + x +3 = -3

2x+3=-3

2x+3-3= -3-3

2x=-6

x=-3

substitute again into y=3x-9

y=3(-3)-9

y=-9-9

y=-18