Y+4=0.25(x-3) is the equation in point-slope form
The train will have been traveling for 4 hours
train A=45,90,135, 180
train B=0,60,120,180
Most likely what they mean is
y-5=0
The three friends sharing 4 quarts get a greater amount of blueberries because they each get over 1 quart while in the other group each friend gets less than one quart.
Hope this helps.
The answer is c) y=1/2x because a direct variation is in the formula b=ka where k is a constant.
