Answer: 0.5.
Step-by-step explanation:
Answer:
The mean is 20
Step-by-step explanation:
17+19+21+23=80
80 div 4 = 20
Answer:
12 1/2
Step-by-step explanation:

We need to find thr rate of change (slope) of the line joining these two points ~





Slope of the line (m) joining the two points is 2 ~
Answer:
3 is yes, the rest is no
Step-by-step explanation:
for y = -6x - 9
(1) if x = 7, y = -51 => No
(2) if x = 3, y = -27 => No
(3) if x = -8, y = 39 => Yes
(4) if x = -5, y = 21 => No