Check If a Point Is a Solution to the System

How can you tell if a point is a solution to a system?

• It makes the first equation true.

• The (x,y) coordinates satisfy both equations

• It makes logical sense

• It makes neither equation negative

^{What is the solution?} 

• 1

• -2

• (1, 2)

• (1, -1)

Tags

CCSS.8.EE.C.8B

• Yes

• No

Hint: Plug the point in to check. 

• yes

• no

Is (20, -3) a solution to the system shown?

• Yes

• No

Check to see if (-2,1) is a solution to the following system:

x + 2y = 0

4x + 3y = 1

• YES

• NO

Is (-2,4) a solution to the system?

• Solution

• Not a solution

Tags

CCSS.HSA.REI.D.12

(0,-3) ​​ (a)   so it ​ (b)   a solution to the system of equations.

• makes only one equation true

• is not

• is

• makes both equations true

• makes neither equation true

• does not make either one true

Is the points (-4, 4) a solution to the system of equations?

• Yes

• No

Is ( 2, -1) a solution

*watch your signs*

y = -x - 3

y= 3x + 1

• Yes

• No

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6