Solving Linear Systems Graphically Answers

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Answers:
Blank 1:-2
Blank 2:3
Blank 3:3
Blank 4:-7
5

What do the equations have in common? How are they different?

Answer:

The equations have the same slope, -2, but they have different y-intercepts. The y-intercepts are 4 and -2.

6

Which statements did you include in your answer?

A
The slopes are the same.
B
The y-intercepts are different.
7

intersect at one pointcoincide✔ are parallel

Answers:
The system represents lines that , therefore the system has .:are parallel
The system represents lines that , therefore the system has .:no solution.
8

✔ no solution.exactly one solution.infinitely many solutions.

A
✔ no solution.
B
exactly one solution.
C
infinitely many solutions.
10

Question text not available

Answers:
The system represents lines that , therefore the system has .:intersect at one point
The system represents lines that , therefore the system has .:exactly one solution
13

Which statements did you include in your answer?

A
Option
B
Option
C
Option
15

✔ intersect at one pointcoincideare parallel

Answers:
The system represents lines that , therefore the system has .:intersect at one point
The system represents lines that , therefore the system has .:exactly one solution
16

Which statements did you include in your answer?

A
The slopes are different.
B
The y-intercepts are different.
17

Explain how you can determine that the following system has one unique solution – without actually solving the system.

Question illustration
Answer:

Write each equation in slope-intercept form. Find that the slope of the first line is –2. Find that the slope of the second line is –1. Since the slopes of the lines are different, the lines must have a point of intersection. The point of intersection is the unique solution.

18

How should you modify the graph to show the solution to the system of inequalities below? Check all that apply.

Question illustration
A
Shade above 2x + y = 4.
B
Shade below 2x + y = 4.
C
Shade above 2y = 6 – 2x.
D
Shade below 2y = 6 – 2x.
E
Make the boundary line 2x + y = 4 dashed.
20

no solution✔ exactly one solutioninfinitely many solutions

A
no solution
B
✔ exactly one solution
C
infinitely many solutions

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