Given:
The three points are (-7,134), (-3,10) and (5,50).
To find:
The equation of parabola using quadratic regression.
Solution:
The general equation of quadratic regression is
...(i)
The three points are (-7,134), (-3,10) and (5,50).
Using the graphing calculator, we get a=3, b=-1 and c=-20. Putting these values in (i), we get
Therefore, the equation of parabola is and the missing values in the given equation are 3, -1 and -20.
Multiply top equation by -2, then add equations so b drops out....solve for a...plug in a to get b
Answer:
#4.
- 3 < - 2 1/2
If you consider the number line, the numbers increase from left to right. The number on the left is smaller than a number on the right.
- 3 is smaller than -2 1/2, it means -3 is on the left from the -2 1/2 on the number line.
#5.
Jada's score is positive, it means the number reflecting the score is to the right from zero on the number line.
Isabel's score is negative, it means the number reflecting the score is to the left from zero on the number line.
Since Isabel's score is to the left from the Jada's score, she has lower score than Jada.
With the lowest score, Isabel is the winner.
Answer:, , x > 1/4 and is the systems of inequalities that represent the time Zoe kept Julie awake last night.
Step-by-step explanation:
Since, Here x is representing the number of hours Zoe spent running on her wheel and y is representing the number of hours spent scratching her cage.
Julie was awoke for at least an hour running on her exercise wheel and scratching the of her cage.
That is,
She ran on her wheel at least twice as long as she scratched at the corners of her cage.
That is, ,
Also, She spent more than 1/4 hour running on her wheel.
That is, x > 1/4
And, we know that number of hours can not be negative.
That is,
Therefore, the complete system of inequality which shows the given situation,
,
,
,