Y= -1/2x + 4; (-8,8)

Question

Tell whether the given ordered pair is a solution of the equation

Answer 1

Dean,

 

The ordered pair gives you the values for x and y, (x,y), so x = -8 and y = 8.

 

Plug these values into your equation:  8 = -½·(-8) + 4 = -(-4) + 4 = 8

 

Since both sides of the equation agree (have the same value) then (-8,8) satisfies the equation.  (-8,8) is a point on the line y = -½·x + 4

Answer 2

Plug in the values for x and y

 

8 = (-1/2)(-8) + 4

 

8 = 4 + 4

 

8 = 8

 

Yes, the ordered pair is a solution