Please help me find the answer

Write an equation in slope intercept form of the line passes through the given point and is parallel to the graph of the given equation (0,0); y=3/8 x+2

What would be the reasons for lines 3 and 4? a. addition property; subtraction property b. addition property; solve c. substitution property; subtraction property d. substitution property; prove

This summer the number of tourists in salem increased 4.5% from last years total of 426000. how many more tourists came to salem this summer