Question

x: -2, -1, 3, 4, 5,
y: -7, -5, 3, 5, 7,

find y when x=2

Answer 1

-7

Answer 2

how yo u get that

Answer 3

how you get that

Answer 4

-7 = -2*3 -1 = -2 - 5
-5 = -1*3 - 2 = -1 - 4

3 = 3*3 - 6 = 3 + 0
5 = 4*3 - 7 = 4 + 1
7 = 5*3 - 8 = 5 +2

missing add numbers in y

-3 = 0 - 3
-1 = 1 - 2
1 = 2 - 1

pattern

-(2n+1) = -(1-n) - (2n-1), where n = any integer
If we let x = -(1-n) and y = -(2n+1), then
y = x - (2n-1), for any given integer

if x = 2, then x = -(1-n)=2 --> n = 3
and y = -(2n+1) --> y = -(2*3+1) = -7

so when x = 2, y = -7