Answer:
1
Step-by-step explanation:
The equation of a line in slope- intercept form is
y = mx + c ( m is the slope and c the y- intercept )
y = x ← is in slope- intercept form
with slope m = 1


There will be 9 trips the ferry makes and on the last trip there will be 5 cars on the ferry.
First box’s is angle addition postulate. The the second box is x=15