An Experiment Was Performed on a Certain Metal to Determine

question 131

Multiple Choice

An experiment was performed on a certain metal to determine if the strength is a function of heating time.Results based on 10 metal sheets are given below.Use the simple linear regression model. = 30 = 104 = 40 = 178 = 134 Find the estimated y intercept and slope and write the equation of the least squares regression line.

• A)14 - 68x
• B)2 + 0x
• C)0 + 1x
• D)1 + 1x

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Definitions:

RPM

Revolutions per minute, a unit of rotational speed that indicates the number of turns made by an object in one minute.

Universal Motor

An electric motor that can operate on either AC or DC power and is commonly used in portable tools and appliances.

AC

Alternating Current, a type of electrical current where the flow of electric charge periodically reverses direction, commonly used in power supplies.

DC

Direct Current, an electrical current that flows in one direction only, typical in batteries and DC power supplies.