4. Peter is retiring after working for 30 years at a major bank. The company offers him a flat monthly retirement benefit of $60 for each year of service. What will his monthly pension be?

a

step-by-step explanation:

answer: 33 ( approx)

step-by-step explanation:

since, in the linear regression formula, the slope is the a in the equation y = b + ax ( by comparing it with the general equation of line y = mx + c )

where,

here given table is,

price ($), x   :           18         23       25       29       30       33

pairs sold, y :         16         13         10       8         6       2

so, ,   ,   ,

and   ,

thus, slop of the given line is,

⇒  

⇒   ≈ 33

113.1

step-by-step explanation:

v=4

3πr3=4

3·π·33≈113.09734