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Elementary and Intermediate Algebra
Mark Dugopolski, Southeastern Louisiana University

Linear Equations in Two Variables and Their Graphs
Graphing Lines in the Coordinate Plane

Warm-Ups



1

The point (2, 4) satisfies the equation 2y - 3x = -8.
A)TRUE
B)FALSE
2

If (1, 5) satisfies an equation, then (5, 1) also satisfies the equation.
A)TRUE
B)FALSE
3

The origin is in quadrant I.
A)TRUE
B)FALSE
4

The point (4, 0) is on the y-axis.
A)TRUE
B)FALSE
5

The graph of x + 0 · y = 9 is the same as the graph of x = 9.
A)TRUE
B)FALSE
6

The graph of x = -5 is a vertical line.
A)TRUE
B)FALSE
7

The graph of 0 · x + y = 6 is a horizontal line.
A)TRUE
B)FALSE
8

The y-intercept for the line x + 2y = 5 is (5, 0).
A)TRUE
B)FALSE
9

The point (5, -3) is in quadrant II.
A)TRUE
B)FALSE
10

The point (-349, 0) is on the x-axis.
A)TRUE
B)FALSE