Is this the correct answer?

yes

Step-by-step explanation:

The slope of the line is -1/1 = -1

y = -x + b

we plug in a point

1 = -1 + b

b = 2

y = -x + 2

y = 3x+3

-x+2 = 3x+3

-1 = 4x

x  = -1/4

step-by-step explanation:

the original amount doesn't ''re just looking for the time it takes for 1/2 of the substance to we have

(1/2) =)     take the ln   of both sides

ln (1/2)   = )   and we can write

ln(1/2) = ) lne     and lne   = 1     so we have

ln(1/2) = -.1092t     divide both sides by -.1092

t = ln(1/2)/-.1092 = about 6.347 days = about 6.3 days (rounded)