If two lines are parallel, their slopes will be equal. If they are perpendicular, the slope of the first line multiplied by the slope of the second line will equal 1. If they are neither, they won't have any special relationship.
Line A: Slope = (7 - 5)/(0 - -3), which is equal to 1/3
Line B: Slope = (4 - 2)/(9 - 6), which is also equal to 1/3.
The two slopes are the same, therefore they are parallel.
The medium sized orange would have 62 calories. To divide by 1/5, which in decimal form is 0.2, you just multiply 310 by 0.2, therefore, giving you 62. Hope this helps!
