Intro to Linear Equations

Function Form

100

Write the equation in function form:

x+y=5

y=-x+5

200

Write the equation in function form:

-x+y=14

y=x+14

300

Write the equation in function form:

4x+2y=10

y=-2x+5

400

Write the equation in function form:

x-y=-6

y=x+6

500

Write the equation in function form:

3x-6y=24

y=0.5x-4

Solution or No?

100

Tell if the given point is a solution to the equation:

4x-5y=20

Point: (1,-3)

4(1)-5(-3)=20

4+15=20

19=20

No!

200

Tell if the given point is a solution to the equation:

4x-5y=20

Point: (5,0)

4(5)-5(0)=20

20=20

Yes!

300

Tell if the given point is a solution to the equation:

4x-5y=20

Point: (0,4)

4(0)-5(4)=20

-20=20

No!

400

Tell if the given point is a solution to the equation:

4x-5y=20

Point: (10,4)

4(10)-5(4)=20

40-20=20

Yes!

500

Tell if the given point is a solution to the equation:

4x-5y=20

Point: (-10,-12)

4(-10)-5(-12)=20

-40+60=20

Yes!

Points

100

Find the y-value when x=3

y=x-7

y=-4

200

Find the y-value when x=5

y=2x-3

y=7

300

Find the y-value when x=-2

2x+y=7

y=11

400

Find the x-value when y=-8

3x+y=10

x=6

500

Find the x-value when y=-12

3x-2y=30

x=2