Hi, I just had an assignment in mathematics and I was wondering if someone could check my answers. Thanks!

Question

1. Find the next three terms in the sequence.
3, 12, 21, 30, ...
My answer - C) 39, 48, 57
2. Identify the sequence as arithmetic, geometric, or neither.
1.6, 0.8, 0.4, 0.2, ...
My answer - B) geometric
3. 5 * 3^n
My answer - D) 15, 45, 135, 405
4. Scientists estimate the rate of a wildebeest running at full speed to be 66 feet per second. Write a function rule to describe the relationship between the time, t, and the distance, d, a wildebeest travels when running at full speed.
My answer - D) d = 66t
5. Find the slope of the line through (-9, -10) and (-2, -5).
My answer - I am not sure whether it is 5/7 or -7/5. My mom says it is -7/5, but i am not sure.
6. Do the data in the table represent a linear function? If so, write a rule for the function.
My answer - D) no
7. Use the slope and two points to write a linear function rule for the graph.
(^ It will not let me post the image of the graph on here.)
My answer - B) y = 2x - 6

^ I'm not sure if all of them are correct or not, but I would feel much better if someone checked them for me. Thank you to anyone who helps. :)

- Merlana

Answer 1

1. yes d = 9
2. yes, r = .5
3. yes
4. yes
5. dY = -5+10 = 5, dX = -2+9 = 7 dY/dX = 5/7
6. no idea
7. no idea

Answer 2

But your mother only got 6/7 :)

Answer 3

Thanks again Damon! :)