Question 1195479
.
Data on tuition and mid-career salary are collected from a number of universities and colleges. 
The result of the data collection is the linear regression model

y=−0.85x+157

where x=annual tuition and
y=average mid-career salary of graduates, both in thousands of dollars.
(a) Which quantity is the independent variable?
average mid-career salary of graduates
annual tuition
Correct
(b) According to this model, what is the average salary for a graduate of a college or university 
where the annual tuition is $30,000?
$
(c) What is the slope of this regression model?
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<pre>
    (a)  To answer question (a), read your post. The answer is there.



    (b)  To answer question (b), replace x in the formula by the given number 30000;  then calculate right side.



    (c)  the slope is the value of the coefficient at x in the formula.
</pre>


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