The equation of the line passing through
and
is
. Here
is the slope of the line.
Substituting numerical values, the equation of the line is

The equation of the line is 
James will need 115.08mg of medicine at the start of day 6.
Answer:
243
Step-by-step explanation:
make 90% into a decimal
0.9
multiply 270 by 0.9 to get the answer of 243