Tell Whether a Linear Model or a Quadratic Model Is $x ^ { 2 }$

question 226

Multiple Choice

Tell whether a linear model or a quadratic model is appropriate for the data. If linear, tell whether the slope should be positive or negative. If quadratic, decide whether the leading coefficient a of $x ^ { 2 }$ should be positive or negative.
-The height of a ball thrown from the ground, as a function of time.

• A) linear; positive
• B) linear; negative
• C) quadratic; positive
• D) quadratic; negative

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Definitions:

Real Interest Rate

The interest rate corrected for the effects of inflation.

Price Level

A measure of the average prices of goods and services in an economy at a given time period.

Real Wealth

The value of an individual's or entity's assets, taking into account the effects of inflation on purchasing power.

Liquidity Preference

The desire to hold cash or easily convertible assets rather than investments that might be harder to convert into cash.