Answer:
Positive relationship exists
Linear trend line
R² = 0.3522
Step-by-step explanation:
Given the data :
Promote (X) :
77
110
110
93
90
103
95
103
89
97
100
96
88
109
109
Sales (Y) :
85
103
102
109
85
112
96
93
97
92
94
81
92
108
103
A.) From the resulting plot, tbe slope of the graph is positive, hence, we can conclude that there exist a positive relationship between the variables 'promote' and 'sale'.
The linear trend line gives the best fit for the data with a correlation Coefficient, R value of 0.5935
The R² value is 0.3522. R² is the Coefficient of determination which gives the percentage of explained variation. For this data, about 35% of variation in sales is given by the best fit line.
Answer:
Center: 
Radius: 
Step-by-step explanation:
-According to the following equation, the center would be , because the center is known as 
from the equation of a circle. To find the radius, you would only need to square root the simplified radius from the following the equation and you would get the radius 15:
The equation of a circle:
The following equation:
Center: Radius: 
Answer:
you are right............
The standard deviation been hiked to the nearest tenth is 17.1
Answer:
y = 
x - 
Step-by-step explanation:
The equation of a line in slope- intercept form is
y = mx + c ( m is the slope and c the y- intercept )
y = - x - 3 ← is in slope- intercept form
with slope m = -
Parallel lines have equal slopes , then
y = - x + c ← is the partial equation of line d
to find c substitute (- 2, - 2 ) into the partial equation
- 2 = 
+ c ⇒ c = - 2 - = -
y = - x - ← equation of line d
