Question

Statistics students in Oxnard College sampled 9 textbooks in the Condor bookstore and recorded the number of pages in each textbook and its cost. The bivariate data are shown below:
Number of Pages (
x
) Cost(
y
)
322 41.2
895 103.5
232 22.2
618 74.8
394 51.4
814 89.4
884 97.4
919 89.9
929 109.9


A student calculates a linear model
y
=

x
+
. (Please show your answers to at least 4 decimal places)
Use the model to estimate the cost when number of pages is 407.
Cost = $
(Please show your answer to 2 decimal places.)

Answer 1

By using the linear function which models the data in the given table, the cost of a textbook with 402 pages is equal to $47.4478.

What is a scatter plot?

A scatter plot can be defined as a type of graph which is used for the graphical representation of the values of two variables, with the resulting points showing any association (correlation) between the data set.

What is a linear function?

A linear function can be defined as a type of function whose equation is graphically represented by a straight line on the cartesian coordinate.

By critically observing the graph (see attachment) which models the data in the given table, we can infer and logically deduce that the linear function is given by:

y = 0.1057x + 4.9564

If x = 402, then y is given by:

y = 0.1057(402) + 4.9564

y = 42.4914 + 4.9564

y = $47.4478.

Read more on scatterplot here: brainly.com/question/6592115

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