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Why is it easier to go down a slope than up a slope?
Gravity helps you move down the slope but works against you on the way up.
What are the properties of a slope?
The slope is the ratio of the vertical increase divided by the horizontal increase. The slope of a flat line is 0. The slope of a flatter line is smaller than the slope of a steeper line. A positive slop indicates that the line move up from left to right. A negative slope means that the line moves down from left to right.
Why were zeppelins relatively unsatisfactory as air fighting machines?
They aren't particularly manouverable, and easy to hit.
Do the slope of direct variation changes as you move along the graph?
No.
How will changing the 3 into an 8 in the equation y equals 2x-3 affect the graph?
First, you need to understand that y = 2x - 3 is the slope-intercept form of a line. Remember from middle/high school algebra that the slope-intercept form of a line is: y = mx + b where: m is the slope of the line b is the y-intercept of the line since -8 < -3, the y-intercept moves "down". Since the slope is unchanged, the rest of the line must also move "down". I will leave the amount that the line moves "down" as an exercise for the reader ;)
