the direction and length of a straight line from from the starting point to the ending point of an object's motion

and 1-29 or 1-19

If we are using 2D coordinates, then

d^2 = (x2-x1)^2 + (y2-y1)^2
tanθ = (y2-y1)/(x2-x1)

Now go for it, with a little thought of your own...

The direction and length of a straight line from the starting point to the ending point of an object's motion can be determined using basic geometry calculations. Here are the steps to find these measurements:

1. Identify the starting point and the ending point of the object's motion. These points can be represented as coordinates on a graph or as latitude and longitude coordinates on a map, depending on the context.

2. Calculate the change in horizontal position (Δx) and vertical position (Δy) between the starting and ending points. This can be done by subtracting the x-coordinate (horizontal) and y-coordinate (vertical) of the starting point from the x-coordinate and y-coordinate of the ending point, respectively.

3. Use the Pythagorean theorem to find the length of the straight line between the starting and ending points. The Pythagorean theorem states that c^2 = a^2 + b^2, where c is the length of the hypotenuse (the straight line), and a and b are the lengths of the other two sides (Δx and Δy). Plug in the values of Δx and Δy to calculate the length of the straight line.

4. Lastly, determine the direction of the straight line by considering the angle it forms with a reference point or axis. One common convention is to use angles measured counterclockwise from the positive x-axis. You can calculate this angle using trigonometric functions such as tangent or inverse tangent, by dividing the change in vertical position (Δy) by the change in horizontal position (Δx).

Regarding your second query, "1-29 or 1-19," it seems to be incomplete or unrelated to the previous question. Please provide more context or clarify your query so I can assist you further.