Question

Need help me PreCalculus!!!!!!

Answer 1

equation of line
y=mx+c
m= slope

Answer 2

slope =1/2given

Answer 3

y=x/2+c
now y intercept=y=0
0=x/2+c

Answer 4

subtractin c
-c=x/2
x=-2c

Answer 5

but x=xintercept=12
12=-2cdivide by both side by 2
12/2=-c
c=-6