Please help me wit this

1. Equation: y = -1.17491x + 81.791 (you may need to round!)

2. Correlation coefficient: -0.8566

3. Strong negative correlation because the correlation coefficient is close to -1

4. Sketch the scatterplot using north latitude as the x value and Jan mean temp as the y value on the graph

Step-by-step explanation:

Step 1: Go to desmos graphing calculator

Step 2: Insert a table

Step 3: Insert values into the table (shown in image) using the north latitude as the x value and jan mean temp as y value

Step 4: Go to line 2, and type "" except replace "=" with ~ as shown in the image. Put the 1s as subscripts

Step 5: Scroll out. Desmos would've graphed the line of best fit and plotted the points. Under statistics, you can see that r is the correlation coefficient

Step 6: The correlation coefficient r will be between -1 and 1. If it is closer to -1 or 1, it is a strong correlation. If it is closer to 0, it is a weak correlation. For example. -0.6 is closer to -1 than it is to 0, so it is a strong negative correlation. You can see that r here is -0.8566, which is strong negative.

Step 7: Lastly, you need to make the equation. It will be in the form y = mx + b. If you look under "parameters", there will be a value for m and b. Plug that in to the equation. Check to see if you need to round.

Step 8: To graph the scatterplots, you can use the graph and the points that desmos plotted as a reference. Good luck!

I hope I did it right, we just finished this at school and I got 100% on the test. Comment with any questions. Best of luck! - brainpop72

b

step-by-step explanation:

2. angles qrt and qst both measures 156 degrees.

step-by-step explanation:  

we have been given a diagram of a circle and we are told that measure of arc qvt is 156 degrees.  

we can see from our given diagram that angle qrt and angle qst subtends to arc qvt.

since we know that angles subtended by the same arc at the circumference are always equal.

by angle subtended by same arc theorem, measure of angle qrt and angle qst will be equal to the measure of arc qvt.

therefore, angles qrt and qst both measures 156 degrees and 2nd statement is the correct choice.