Answer:
17
Step-by-step explanation:
y=mx+b
B is the y intercept
Answer: D
Step-by-step explanation: A line of best fit is a straight line that is the best approximation of the given set of data. It is used to study the nature of the relation between two variables.
Its the first one, because x wont be affected, and 1 and -3 is a constant.
Answer:
19 meters
Step-by-step explanation:
Hope it helps :)
Answer:
Tn = -n^2 - n + 21 is the formula for the nth term.
Step-by-step explanation:
The second differences are all equal in this quadratic sequence.
Now, the quadratic sequence has a formula of Tn = an^2 + bn + c
Find the value of a in an^2 by dividing the difference by 2:
-2/2 = -1
a = -1
Since T1 is 19 and T2 is 15 we can put that into the equation and simplify:
b + c = 20
2b + c = 19
Thus, b = -1 , c = 19 and the general formula for the nth term is Tn = -n^2 - n + 21