An independednt variable is a variable that doesnt need any support Dependent is where there is variable, but it depends on something else.
For example,
y=2x+1
y is dependent, becuase it depend on 2x+1
x is independent, beucase it doesnt need to depend on anything.
The answer is 3 days. My work is in the pic in case you need it
-7.14 should be your answer!
A. Zero points of intersection
the lines are parallel