Question

answer the 19th and 20th question​

Answer 1

Step-by-step explanation:

1. y = 2x + 3

b) if (3,9) then x = 3 and y = 9

9=2(3)+3

9=9

since LHS= RHS , b) (3,9) lies on the line

2. y=3x+4

if d) (4,12)

then, x =4 and y = 12

12=3(4)+4

12=16

since LHS≠RHS , (4,12) does not lie on line

Answer 2

Answer:

Q.19 : b

Q.20: d

Step-by-step explanation:

In both question just substitute the value of x co-ordinate in the equation to find the answer.

Q19. y = 2x+3

(3,9)  y=2*3+3 which is y=6+3 = 9 for other options this will not match with coordinate given.