Here, slope (m) = y2 - y1 / x2 - x1
m = 6-4 / 12-4
m = 2 / 8
m = 1/4
Equation, y - y1 = m(x - x1)
y - 4 = 1/4 (x - 4)
Also, y - 6 = 1/4 (x - 12)
In short, Your Answers would be Option A & F
Hope this helps!
The correct answer to the problem in 130 student tickets was sold
Answer:
90
Step-by-step explanation:
30 / 0.2 = 150
150 x 0.60 = 90
A strong positive correlation.
Step-by-step explanation:
The question requires you to calculate the correlation coefficient and then make a conclusion about its value.
Form a table as shown where x is cost of items and y is shipping cost
x y xy x² y²
25 5.99 149.8 625 35.9
45 8.99 404.6 2025 80.8
50 8.99 449.5 2500 80.8
70 10.99 769.3 4900 120.8
190 34.96 1773.2 10050 318.3 ------sum
The formula for correlation coefficient follows;
r=n(∑xy)-(∑x)(∑y) ÷ √{[n∑x²-(x)²] [n∑y²-(y)²]}
where n=4
r=4(1773.2)-(190)(34.96) ÷ √{[4(10050)-190²] [4(318.3)-34.96²]}
r=450÷ √{4100*51)
r=450÷√209100
r=450÷457.3
r=0.98409
The value of r indicates a stronger positive correlation
Learn More
Correlation coefficient :brainly.com/question/12528676
Keywords :shipping costs,cost of items, strength of the model
#LearnwithBrainly
