Answer:
18
Step-by-step explanation:
In the linear regression equation y=a+bx, slope coefficient b represents average unit increases in y variable due to unit increase in x variable.
In the given equation ŷ = 84 + 18x, b=18 represents average unit increases in gas used due to unit increase in degree day.
Hence,on average, gas used increase by 18 for each additional degree-day.
<h2>
Answer:</h2>
To solve this system, we will use the graphing method.
Based on the graph shown below, we can conclude that this system has infinite solutions, because they are the same line.
Answer:
The airplane ascends meters in one second.
Step-by-step explanation:
Given that the airplane ascends () meters in seconds, we calculate the ascent rate of the airplane by simple rule of three:
The airplane ascends meters in one second.
Answer:
b. (12, 485)
Step-by-step explanation:
We have been given the number of men receiving degrees (in thousands) is given by the equation , and for women, the equation is , where x is the number of years since 1970.
Let us find the coordinates of the point of intersection of both lines by equating our both equations as:
Upon substituting x=11.7757 in our equations we will get,
Upon rounding our answers to nearest whole number we will get,
Therefore, the point (12,485) will be the solution of our given equations and option b is the correct choice.