To graph systems of equations, find the values of x and y. The values of x and y must satisfy the equation. Assigning values for x is important. Use the assigned values for x to solve for y. Be careful with the signs of the coefficients. Plot the points in a Cartesian plane to get the solution.
Answers:
For the graph, just plot the points in a Cartesian coordinate plane. Kindly see the attachment below.
Solutions:
Assign values for x.
Derive values for y using the assigned values for x.
Plot the points.
1. y = x + 5 (1)
y = 5x + 5 (2)
x -2 -1 0 1 2
y(1) 3 4 5 6 7
y(2) - 5 0 5 10 15
if x = -2 if x = -1 if x = 0 if x = 1 If x = 2
y = x + 5 y = x + 5 y = x + 5 y = x + 5 y = x + 5
y = (-2) + 5 y = (-1) + 5 y = 0 + 5 y = 1 + 5 y = 2 + 5
y = 3 y = 4 y = 5 y = 6 y = 7
y = 5x + 5 y = 5x + 5 y = 5x + 5 y = 5x + 5 y = 5x + 5
y = 5(-2) + 5 y = 5(-1) + 5 y = 5(0) + 5 y = 5(1) + 5 y = 5(2) + 5
y = -10 + 5 y = -5 + 5 y = 0 + 5 y = 5 + 5 y = 10 + 5
y = -5 y = 0 y = 5 y = 10 y = 15
2. x - 3y = -12 (1)
4x + 6y = -12 (2)
x -2 -1 0 1 2
y(1) 3 3 4 4 4
y(2) - -1 -2 -2 -3
if x = -2 if x = -1 if x = 0 if x = 1 If x = 2
x - 3y = -12 x - 3y = -12 x - 3y = -12 x - 3y = -12 x - 3y = -12
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Graphing Systems of Equations
To graph systems of equations, find the values of x and y. The values of x and y must satisfy the equation. Assigning values for x is important. Use the assigned values for x to solve for y. Be careful with the signs of the coefficients. Plot the points in a Cartesian plane to get the solution.
Answers:
For the graph, just plot the points in a Cartesian coordinate plane. Kindly see the attachment below.
Solutions:
1. y = x + 5 (1)
y = 5x + 5 (2)
x -2 -1 0 1 2
y(1) 3 4 5 6 7
y(2) - 5 0 5 10 15
if x = -2 if x = -1 if x = 0 if x = 1 If x = 2
y = x + 5 y = x + 5 y = x + 5 y = x + 5 y = x + 5
y = (-2) + 5 y = (-1) + 5 y = 0 + 5 y = 1 + 5 y = 2 + 5
y = 3 y = 4 y = 5 y = 6 y = 7
y = 5x + 5 y = 5x + 5 y = 5x + 5 y = 5x + 5 y = 5x + 5
y = 5(-2) + 5 y = 5(-1) + 5 y = 5(0) + 5 y = 5(1) + 5 y = 5(2) + 5
y = -10 + 5 y = -5 + 5 y = 0 + 5 y = 5 + 5 y = 10 + 5
y = -5 y = 0 y = 5 y = 10 y = 15
2. x - 3y = -12 (1)
4x + 6y = -12 (2)
x -2 -1 0 1 2
y(1) 3
3
4 4
4
y(2) -
-1
-2 -2
-3
if x = -2 if x = -1 if x = 0 if x = 1 If x = 2
x - 3y = -12 x - 3y = -12 x - 3y = -12 x - 3y = -12 x - 3y = -12
-2 - 3y = -12 -1 - 3y = -12 0 - 3y = -12 1 - 3y = -12 2 - 3y = -12
-3y = -12 + 2 -3y = -12 + 1 -3y = -12 -3y = -12 - 1 -3y = -12 - 2
-3y = -10 -3y = -11 -3y = -12 -3y = -13 -3y = -14
y =
y =
y =
y =
y =
y = 3
y = 3
y = 4 y = 4
y = 4
4x + 6y = -12 4x + 6y = -12 4x + 6y = -12 4x + 6y = -12 4x + 6y = -12
4(-2) + 6y = -12 4(-1) + 6y = -12 4(0) + 6y = -12 4(1) = 6y = -12 4(2) + 6y = -12
-8 + 6y = -12 -4 + 6y = -12 0 + 6y = -12 4 + 6y = -12 8 + 6y = -12
6y = -12+ 8 6y = -12 + 4 6y = -12 6y = -12 - 4 6y = -12 - 8
6y = -4 6y = -8 6y = -12 6y = -16 6y = -20
y = -
y = -
y = -
y = -
y = -
y = -
y = - 1
y = -2 y = -2
y = -3
3. x + 2y = -5 (1)
2x + y = 3 (2)
x -2 -1 0 1 2
y(1) -1
-2 -2
-3 -3
y(2) 7 5 3 1 -1
if x = -2 if x = -1 if x = 0 if x = 1 If x = 2
x + 2y = -5 x + 2y = -5 x + 2y = -5 x + 2y = -5 x + 2y = -5
-2 + 2y = -5 -1 + 2y = -5 0 + 2y = -5 1 + 2y = -5 2 + 2y = -5
2y = -5 + 2 2y = -5 + 1 2y = -5 2y = -5 - 1 2y = -5 - 2
2y = -3 2y = -4 2y = -5 2y = -6 2y = -7
y = -
y = -
y = -
y = -
y =-
y = -1
y = -2 y = -2
y = -3 y = -3
2x + y = 3 2x + y = 3 2x + y = 3 2x + y = 3 2x + y = 3
2(-2) + y = 3 2(-1) + y = 3 2(0) + y = 3 2(1) + y = 3 2(2) + y = 3
-4 + y = 3 -2 + y = 3 0 + y = 3 2 + y = 3 4 + y = 3
y = 3 + 4 y = 3 + 2 y = 3 y = 3 - 2 y = 3 - 4
y = 7 y = 5 y = 3 y = 1 y = -1
4. y = 3x - 2 (1)
y = -x - 6 (2)
x -2 -1 0 1 2
y(1) -8 -5 -2 1 4
y(2) -8 -7 -6 -5 -4
if x = -2 if x = -1 if x = 0 if x = 1 If x = 2
y = 3x - 2 y = 3x - 2 y = 3x - 2 y = 3x - 2 y = 3x - 2
y = 3(-2) - 2 y = 3(-1) - 2 y = 3(0) - 2 y = 3(1) - 2 y = 3(2) - 2
y = -6 - 2 y = -3 - 2 y = 0 - 2 y = 3 - 2 y = 6 - 2
y = -8 y = -5 y = -2 y = 1 y = 4
y = -x - 6 y = -x - 6 y = -x - 6 y = -x - 6 y = -x - 6
y = -(-2) - 6 y = -(-1) - 6 y = -(0) - 6 y = -(1) - 6 y = -(2) - 6
y = 2 - 6 y = 1 - 6 y = 0 - 6 y = -1 - 6 y = -2 - 6
y = -4 y = -5 y = -6 y = -7 y = -8
5. 2x - 3y = -2 (1)
4x + y = 24 (2)
x -2 -1 0 1 2
y(1) -
0
1
2
y(2) 32 28 14 20 16
if x = -2 if x = -1 if x = 0 if x = 1 If x = 2
2x - 3y = -2 2x - 3y = -2 2x - 3y = -2 2x - 3y = -2 2x - 3y = -2
2(-2) - 3y = -2 2(-1) - 3y = -2 2(0) - 3y = -2 2(1) - 3y = -2 2(2) - 3y = -2
-4 - 3y = -2 -2 - 3y = -2 0 - 3y = -2 2 - 3y = -2 4 - 3y = -2
-3y = -2 + 4 -3y = -2 + 2 -3y = -2 -3y = -2 - 2 -3y = -2 - 4
-3y = 2 -3y = 0 -3y = -2 -3y = -4 -3y = -6
y = -
y = 0 y =
y = 1
y = 2
4x + y = 24 4x + y = 24 4x + y = 24 4x + y = 24 4x + y = 24
4(-2) + y = 24 4(-1) + y = 24 4(0) + y = 24 4(1) + y = 24 4(2) + y = 24
-8 + y = 24 -4 + y = 24 0 + y = 24 4 + y = 24 8 + y = 24
y = 24 + 8 y = 24 + 4 y = 24 y = 24 - 4 y = 24 - 8
y = 32 y = 28 y = 24 y = 20 y = 16
How to graph systems of equations: brainly.ph/question/6130029
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