(a) In 1918 the lean was 2.9071 meters. (The coded value is 71.) Using the least-squares equation for the years 1975 to 1987, calculate a predicted value for the lean in 1918. (Note that you must use the coded value 18 for year.)

The predicted value of the year 18 is 107

Step-by-step explanation:

create a scatter plot for year and mean variables.

(i have done that with Microsoft excel check the attachment from 1-3)

Least square regression equation:

y = 9.3187x - 61.121

Predicted value of the lean 18

y = 9.3187 x (18) - 61.121

y = 107

The predicted value of the year 18 is 107

it is x=-4

step-by-step explanation:

answer: solve 5\cdot 2^x=2405⋅2  

x

=2405, dot, 2, start superscript, x, end superscript, equals, 240.

solution

to solve for xxx, we must first isolate the exponential part. to do this, divide both sides by 555 as shown below. we do not multiply the 555 and the 222 as this goes against the order of operations!

\begin{aligned} 5\cdot 2^x& =240 2^x& =48 \\ \end{aligned}  

5⋅2  

x

2  

x

​    

=240

=48

​

step-by-step explanation: