Illustrate linear equations in two variables; Graph linear equations in two variables; are parallel, intersecting variables. Identify if the graphs of linear equations in two variables coincide and intersect. Differentiate the three kinds of graphs of linear equations: parallel, intersecting, and coinciding.
Pretest
Choose the letter of the correct answer. Write the chosen letter on a separate sheet of paper.
1. Which of the following is a system of linear equations in two variables?
A. 3x + 4y = 12
B. 4x + Sy = 12
C. Zx + 3y = 3
D. Sx + Ix + y = 10
What point is the intersection of the graphs of the lines x = 6 and 2x + y = 32?
A. (3,3)
B. (3, -31)
C. (-3, 3)
D. (-3,-3)
3. How many solutions does a consistent and independent system of linear equations have?
A. 0
B. 1
C. 2
D. Infinite