total variable cost
Horizontal curve is a curve viewed in the x and y plane, while a vertical curve is viewed in the y plane only, or viewed from the side. Think of it like a cake. the top is the horizontal and the front is the vertical
speed
a linear curve does not represent x^2
Both curves plot the relationship between X, in this case a good, and something when income varies. However there's different variables on the vertical axis. The ICC has a composite good on the vertical axis while the Engel curve has income on the vertical axis.
The slope of the curve at each point on thegraph is the speed at that point in time. (Not velocity.)
An Allen curve is a graphical representation which reveals the exponential drop in frequency of communication between engineers as the distance between them increases.
the demand curve for a good is very unlikely to be perfectly vertical because
In physics, a sine curve is used to represent periodic phenomena such as simple harmonic motion or alternating current. It shows how a quantity varies sinusoidally with time or distance. The amplitude, frequency, and phase of the sine curve provide important information about the behavior of the system being studied.
The money supply curve is assumed to be vertical by many textbooks based on the belief that the supply of money is unaffected by the changes in interest rates.
An example graph for distance and time would typically be a straight line if the object is moving at a constant speed, indicating a linear relationship between distance and time. The x-axis would represent time, while the y-axis would represent distance. If the object is stationary, the line would be flat, showing no change in distance over time. If the object accelerates, the line would curve upwards, indicating increasing distance over time.
The variable plotted along the vertical axis is the distance in the first case, speed in the second. The gradient of (the tangent to) the distance-time graph is the speed while the area under the curve of the speed-time graph is the distance.
The distance between the middle and the inflection point is the standard deviation.