The mapping diagram shows a function. What could be a possible value for the
missing number n?
A7
C9
B8
D 15

Step-by-step explanation:

Numbers 7, 8 and 9 in the domain each already has an image in the co-domain (3, 1 and 1 respectively)

Since n has 2 as its image, n cannot be 7, 8 or 9. Therefore the best answer here is 15. (D)

(- 1, 0 )

step-by-step explanation:

an x- intercept is where the function crosses the x- axis.

to find the x- intercept/s look for the value of x when f(x) = 0

from the given table there are 3 values of x where f(x) = 0

when x = - 1, x = 2, x = 3

the one that is listed is (- 1, 0 )

b

step-by-step explanation:

the word superfluous means unnecessary