Question

Consider the equation 2x+ 4y= 8. Which of the following points does not lie on this straight line of the linear graph?
a.(1, 1.5)
b.(0.5, 1.75)
c.(-0.75, 2.5)
d.(2, 1)

Answer 1

Answer:

D

Step-by-step explanation:

put x=2, y=1 in 2x+4y

2×2+4×1= 4+4 =8

Answer 2

Answer:

c. (-0.75, 2.5)

Step-by-step explanation:

Given:

2x + 4y = 8

Solution:

option (a): (x, y) = (1, 1.5)

         2x + 4y = 8

   2(1) + 4(1.5) = 8

             2 + 6 = 8

                   8 = 8 (Both sides are equal)

option (b): (x, y) = (0.5, 1. 75)

         2(0.5) + 4(1.75) = 8

                          1 + 7 = 8

                               8 = 8 (Both sides are equal)

option (c): (x, y) = (-0.75, 2.5)

      2(-0.75) + 4(2.5) = 8

                   -1.5 + 10 = 8

                           8.5 = 8 (Both sides are not equal)

option (d): (x, y) = (2, 1)

         2(2) + 4(1) = 8

                4 + 4 = 8

                      8 = 8(Both sides are equal)

So the answer is option (c) (-0.75, 2.5)