Which relation is a function of x? х y
-1 7
2 -9
2 8
39 -4
Х
-5
-5
A.
B.
1
7
-9
2
-5
-5
C.
х
-8
-8
1
1
y у
-9
2
-9
2
D.
х
-3
-2
4
7
y
--1
5
0
-1

walter needs to make at least 5 more cookies but no more than 40. 5 ≤ x ≤ 40

step-by-step explanation:

20 ≤ x + 15 ≤ 55

subtract 15 from all parts

20-15 ≤ x + 15-15 ≤ 55-15

5 ≤ x ≤ 40

this means how many more cookies he has to make

walter needs to make at least 5 more cookies, but no more than 40 cookies; 5 ≤ x ≤ 40