Question

i need help please i have attatched a picture from hegarty maths

Answer 1

Answer:

2.5

Step-by-step explanation:

Answer 2

-4,-3,-2.5,-2,-1,2,2.5,3,3.5,4,4.5,7

median = n+1/2 = 12+1 /2 = 6.5

value is average of value at 6th and 7th term

2+2.5 /2 = 2.25