Mathematics for Economists: Functions Quiz

What is the general form of a linear function?

Which of the following functions is characterized by having a maximum or minimum point?

Which type of function is represented by the graph of a curve that can grow or decay rapidly?

What feature distinguishes trigonometric functions from other types of functions?

Rational functions have peculiar characteristics. Which of the following statements is true about them?

Which function type is defined by different rules for different intervals of its domain?

The general form of a quadratic function is expressed as:

What is a defining characteristic of logarithmic functions?

Linear functions have a parabolic graph shape.

Exponential functions exhibit a constant rate of change.

Quadratic functions can have up to two real roots.

Rational functions can be undefined at points where the denominator is zero.

Logarithmic functions are defined for all real numbers.

Piecewise functions can exhibit jumps or discontinuous points in their graphs.

Trigonometric functions are used to model non-periodic phenomena.

The general form of a polynomial function has the highest degree term first.

Mathematics for Economists

Topics covered include types of functions, differentiation, maxima and minima, integration, differential equations, matrices, input-output analysis, introduction to linear programming, and linear programming.

Types of Functions

A function is a relationship between an input (independent variable) and an output (dependent variable). Each input is associated with exactly one output.
Linear Functions: General form: y = mx + b. Graph is a straight line. Characteristics: constant rate of change (slope), intercepts the y-axis at a point (y-intercept).
Quadratic Functions: General form: y = ax² + bx + c. Graph is a parabola. Characteristics: symmetrical, has a maximum or minimum point (vertex), can have two, one, or no real roots.
Polynomial Functions: General form: y = axⁿ + aₙ₋₁xⁿ⁻¹ + ... + a₁x + a₀ Graph: Can have various shapes depending on the degree. Characteristics: can have multiple roots, end behavior depends on the leading coefficient.
Exponential Functions: General form: y = a * bˣ. Graph: A curve that either grows or decays rapidly. Characteristics: base b is a positive constant, growth or decay rate depends on b.
Logarithmic Functions: General form: y = logₐ(x). Graph: The inverse of an exponential function. Characteristics: base a is a positive constant, undefined for x ≤ 0.
Trigonometric Functions: General form: Sine (sin), cosine (cos), tangent (tan), etc. Graph: Periodic functions, repeat their patterns. Characteristics: Used to model periodic phenomena like waves.
Rational Functions: General form: y = p(x) / q(x), where p(x) and q(x) are polynomial functions. Graph: Can have vertical and horizontal asymptotes, holes. Characteristics: Undefined at points where q(x) =0.
Piecewise Functions: Defined by different rules for different intervals of its domain. Graph: Can have discontinuous points or jumps.

Test your understanding of various types of functions covered in Mathematics for Economists. This quiz includes questions on linear, quadratic, and polynomial functions, along with their characteristics and graphs. Challenge yourself to differentiate between these function types and apply your knowledge effectively.