Answer: Proportional
Step-by-step explanation:
Given : A flat rate charged by the carpet installer = $40
On addition to that , he charges $1.50 per square foot for labor.
Then , Total cost of carpet= Fixed rate of $40 + $1.50 per square foot for labor.
Let x be the area of the carpet in square feet.
Then, the total cost ( in $)= 40 +1.50x , which is a linear function with slope 1.50.
According to the definition of linear function , we have
A linear function is in the form of , it shows that the relationship between x and y is proportional.
That means , The relationship between the total cost for labor and the amount of carpet installed is proportional.
Answer:
The margin of error M.O.E = 2.5%
Step-by-step explanation:
Given that;
The sample size = 1500
The sample proportion = 0.60
Confidencce interval = 0.95
The level of significance ∝ = 1 - C.I
= 1 - 0.95
= 0.05
The critical value:
(From the z tables)
The margin of error is calculated by using the formula:
M.O.E = 0.02479
M.O.E ≅ 0.025
The margin of error M.O.E = 2.5%