We use distance-time graphs to track the distance ____ by a moving object. We can also use distance-time ____ to calculate the speed of a ____ object at different times in its journey. If the line is ____ this means that the object is stationary (not moving). If the line is straight and diagonal, this means that the object is moving at a ____ speed. The ____ the line, the faster it is moving. If the line is a ____, this means that the object is changing speed. If the line is getting steeper it is ____ up. If the line is getting ____ steep it is slowing down.

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