Answer:
The value of b is 3
Step-by-step explanation:
mx is the slope and b is the y intercept. I hope this helps!
4x+28=-4+8x. 4x-8x=-4-28. -4x=-32. x=8
Answer:
13.96
Step-by-step explanation:
Standard deviation is the square root of the variance, so it's

≈ 13.96