For Problems 14, refer to the following systems of equations:
I.

II.

III.

IV.

For which of these systems are the graphs parallel lines?
Statistics for The Behavioral Sciences (MindTap Course List)
Finite Mathematics
Multivariable Calculus
Applied Calculus
Single Variable Calculus
Calculus: An Applied Approach (MindTap Course List)
Essentials Of Statistics
Essentials of Statistics for The Behavioral Sciences (MindTap Course List)
Calculus: Early Transcendental Functions
Probability and Statistics for Engineering and the Sciences
Single Variable Calculus: Early Transcendentals, Volume I
Finite Mathematics and Applied Calculus (MindTap Course List)
Calculus: Early Transcendentals
Calculus (MindTap Course List)
Precalculus: Mathematics for Calculus (Standalone Book)
Applied Calculus for the Managerial, Life, and Social Sciences: A Brief Approach
Understanding Basic Statistics
Mathematical Excursions (MindTap Course List)
Elementary Geometry For College Students, 7e
Contemporary Mathematics for Business & Consumers
Mathematical Applications for the Management, Life, and Social Sciences
Elementary Technical Mathematics
Elements Of Modern Algebra
Calculus of a Single Variable
Single Variable Calculus: Early Transcendentals
Calculus: Early Transcendental Functions (MindTap Course List)
Trigonometry (MindTap Course List)
Study Guide for Stewart's Single Variable Calculus: Early Transcendentals, 8th
Study Guide for Stewart's Multivariable Calculus, 8th
Introduction To Statistics And Data Analysis
Finite Mathematics for the Managerial, Life, and Social Sciences
Elementary Geometry for College Students
College Algebra (MindTap Course List)
Statistics for Business & Economics, Revised (MindTap Course List)
Research Methods for the Behavioral Sciences (MindTap Course List)
Multivariable Calculus
Research Methods for the Behavioral Sciences (MindTap Course List)
Calculus (MindTap Course List)
Mathematics For Machine Technology
STATISTICS F/BUSINESS+ECONOMICSTEXT
Mathematics: A Practical Odyssey
Functions and Change: A Modeling Approach to College Algebra (MindTap Course List)
College Algebra
Essentials Of Statistics For Business & Economics
Introductory Statistics
Calculus Volume 1
Calculus Volume 2
Discrete Mathematics With Applications
Modern Business Statistics with Microsoft Office Excel (with XLSTAT Education Edition Printed Access Card) (MindTap Course List)
A First Course in Differential Equations with Modeling Applications (MindTap Course List)