The value of a correlation coefficient ranges between -1 and 1.
The greater the absolute value of the Pearson product-moment correlation coefficient, the stronger the linearrelationship.
The strongest linear relationship is indicated by a correlation coefficient of -1 or 1.
The weakest linear relationship is indicated by a correlation coefficient equal to 0.
A positive correlation means that if one variable gets bigger, the other variable tends to get bigger.
A negative correlation means that if one variable gets bigger, the other variable tends to get smaller.
therefore
d is correct
-0.9
Using function concepts, it is found that the turning points of the graph are:
- November 2000, when it goes from increasing to decreasing.
- December 2000, when it goes from decreasing to increasing.
- June 2001, when it goes from increasing to decreasing.
In a graph:
- A function is increasing if it is <u>pointing upwards.</u>
- If it is <u>pointing downwards,</u> it is decreasing.
- A turning point is when the function changes from <u>decreasing to increasing or vice-versa</u>.
In this problem:
- Initially, the function is increasing.
- In month 3, that is, November 2000, it starts to decrease, thus, in November 2000, we have a<u> turning point.</u>
- The next month, that is, December 2000, it starts to increase again, so it is another <u>turning point</u>.
- It increases until month 9, which is June 2001, when it starts to decrease, being the <u>final turning point.</u>
A similar problem is given at brainly.com/question/13539822
Answer:
−2x+6y−10z
Step-by-step explanation:
