115k views
1 vote
Choose the system of equations that matches the following graph:

A. 3x + 4y = 24

3x + y = −3

B. 3x + 4y = 24

3x − y = 3

C. 3x − 4y = −24

3x + y = −3

D. 3x − 4y = −24

3x − y = 3

Choose the system of equations that matches the following graph: A. 3x + 4y = 24 3x-example-1
User Dube
by
5.3k points

1 Answer

13 votes

Answer:

D.

Explanation:

Let's determine the slopes and y-intercepts for both lines. We can use those in the standard form of a straight line: y = mx + b, where m is the slope and b is the y-intercept (the value of y when x = 0).

Slope is the "Rise/Run," or the change in y for a change in x.

See the attached graph for the calculations.

The y intercepts

A. 3x + 4y = 24

4y = -3x + 24

y = (-3/4)x + 24 [Negative slope. Neither of the graphed lines has a negative slope]

3x + y = −3

B. 3x + 4y = 24

4y = -3x + 24 [Same as above. Negative slope. Neither of the graphed lines has a negative slope]

3x − y = 3

C. 3x − 4y = −24

-4y = -3x - 24

y = (3/4)x + 6 [Matches one of the 2 lines]

3x + y = −3

y = -3x -3 [Negative slope. Does not match]

D. 3x − 4y = −24

-4y = -3x - 24

y = (3/4)x + 6 [Matches one of the 2 lines]

3x − y = 3

-y = -3x + 3

y = 3x - 3 [Matches the second of the 2 lines]

The answer is D

Choose the system of equations that matches the following graph: A. 3x + 4y = 24 3x-example-1
User Mojtaba Arezoomand
by
4.7k points