Elementary and Intermediate Algebra

Mark Dugopolski, Southeastern Louisiana University

Linear Equations in Two Variables and Their Graphs

Applications of Linear Equations

Warm-Ups


1	If z = 3r - 9, then z is a linear function of r.
		A)	TRUE
		B)	FALSE


2	The circumference of a circle is a linear function of its radius.
		A)	TRUE
		B)	FALSE


3	The area of a circle is a linear function of its radius.
		A)	TRUE
		B)	FALSE


4	The distance driven in 8 hours is a linear function of your average speed.
		A)	TRUE
		B)	FALSE


5	Celsius temperature is a linear function of Fahrenheit temperature.
		A)	TRUE
		B)	FALSE


6	The slope of the line through (1980, 3000) and (1990, 2000) is 100.
		A)	TRUE
		B)	FALSE


7	If your lawyer charges $90 per hour, then your bill is a linear function of the time spent on the case.
		A)	TRUE
		B)	FALSE


8	The area of a square is a linear function of the length of a side.
		A)	TRUE
		B)	FALSE


9	The perimeter of a square is a linear function of the length of a side.
		A)	TRUE
		B)	FALSE


10	The perimeter of a rectangle with a length of 5 meters is a linear function of its width.
		A)	TRUE
		B)	FALSE

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