Hello!
To find the mean you add all the values up and divide the sum by the amount of numbers added
50 + 125 + 10 + 210 + 50 + 24 + 175 = 644
Divide the sum by the amount of numbers added
644 / 7 = 92
The answer is $92
Hope this helps!
The formula to calculate the amount is 1200(1+0.03/4)^5
Slope: (y2-y1)/(x2-x1)
Plug in the numbers
3/2 = (9-r)/(-4-6)
9 - r = -15, r = 24
Answer: r = 24