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Distance-time graphs is a
way to visually show a collection of data. It allows us to
undertstand the relationships between the data.
The below is a example of a distancetime graph, the time
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Distance-Time for Table 1
Distance(m)
Time (s)
| Distance (s) |
Time (s) |
| 0 |
0 |
| 1 |
13 |
| 2 |
25 |
| 3 |
40 |
| 4 |
51 |
| 5 |
66 |
| 6 |
78 |
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As you can
see, the data from the table is shown in a visual format in the
graph. The time(s) is shown as the x axis and the distance(m) is
shown on the y axis on the graph. The points on the graph do not
create a perfectly straight line so a line of best fit must
be drawn in.
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The proper equation for a line is y=mx
+ b
The y is the dependant variable (on y -axis)
The x is the independent variable (on x-axis)
The m is the slope of the line
The b is the y intercept of the line. |
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In a distance-time graph the equation changes
from
y= mx + b
To
d = v t
d is the dependant variable, lying on the y axis.
t (time) is the
independant variable and lies on the x axis.
v (speed) is the slope of the line.
0 (the initial distance) is the y intercept.
Continue to the next lesson: ::Acceleration:: |