Question 1

Tell whether the equation determines y to be a function of x . $y = 7 x ^ { 2 }$

Accepted Answer

A) no 
B) yes 
A) no 
B) yes

Question 2

Find the constant of variation for the stated condition: y varies directly as x and inversely as z , and y = 185 when x = 70 and z = 14.

Accepted Answer

A) k = 37 
B) k = 12,950 
C) k = 5 
D)  $k = \frac { 1 } { 189 }$ 
E)  $k = \frac { 1 } { 9 }$ 
A) k = 37 
B) k = 12,950 
C) k = 5 
D)  $k = \frac { 1 } { 189 }$ 
E)  $k = \frac { 1 } { 9 }$

Question 3

Tell whether the inverse of the set of ordered pairs $( x , y )$ is a function. $\{ ( 5,2 ) , ( 6,2 ) , ( 7,2 ) , ( 8,2 ) \}$

Accepted Answer

A) no 
B) yes 
A) no 
B) yes

Tell whether the equation determines y to be a function of x . $y = 7 x ^ { 2 }$

Find the constant of variation for the stated condition: y varies directly as x and inversely as z , and y = 185 when x = 70 and z = 14.

Tell whether the inverse of the set of ordered pairs $( x , y )$ is a function. $\{ ( 5,2 ) , ( 6,2 ) , ( 7,2 ) , ( 8,2 ) \}$

Basic Concepts and Properties

Equations, Inequalities, and Problem Solving

Polynomials

Rational Expressions

Exponents and Radicals

Quadratic Equations and Inequalities

Equations and Inequalities in Two Variables

Conic Sections

Systems of Equations

Exponential and Logarithmic Functions

Filters

Exam 9: Functions

Tell whether the equation determines y to be a function of x . y=7x2y = 7 x ^ { 2 }y=7x2

Find the constant of variation for the stated condition: y varies directly as x and inversely as z , and y = 185 when x = 70 and z = 14.

Tell whether the inverse of the set of ordered pairs (x,y)( x , y )(x,y) is a function. {(5,2),(6,2),(7,2),(8,2)}\{ ( 5,2 ) , ( 6,2 ) , ( 7,2 ) , ( 8,2 ) \}{(5,2),(6,2),(7,2),(8,2)}

Basic Concepts and Properties

Equations, Inequalities, and Problem Solving

Polynomials

Rational Expressions

Exponents and Radicals

Quadratic Equations and Inequalities

Equations and Inequalities in Two Variables

Conic Sections

Systems of Equations

Exponential and Logarithmic Functions

Filters

Tell whether the equation determines y to be a function of x . $y = 7 x ^ { 2 }$

Tell whether the inverse of the set of ordered pairs $( x , y )$ is a function. $\{ ( 5,2 ) , ( 6,2 ) , ( 7,2 ) , ( 8,2 ) \}$