### Home > APCALC > Chapter 6 > Lesson 6.4.1 > Problem 6-123

6-123.

Trace the distance-time graph and the tangent at second on your paper. Distance

*is measured in feet.*

Estimate the velocity at

s.Estimate the slope of the tangent.

Locate another time on the graph where the object has the same velocity as

. Use you graph to show how you know the velocities are equal.Sketch various tangent lines to the graph of

. Keep sketching until you find one with the same slope as the tangent at.Parallel lines have the same slope.