Can someone please help me.

Step-by-step explanation:

One

The input is the top line. B is the output when multiplied by 4

B = 4A

Input        A       12        15       47        34

Output     B       48       60    188       136

Rule: 12 * 4 = 48;       15*4 = 60  

Check the other two.

Two

B = A/2

Input       A         44         56        18          26           20

Output    B          22        28         9           13            10

Rule: 44/2 = 22;         56/2 = 28

Check the others.

y=3x+4

step-by-step explanation:

given the points a(0,4) and b(-4, -8)

eqn of line ab: (y-4)/(x-0)=(-8-4)/(-4-0)

(y-4)/x=-12/-4=3

y=3x+4