Question

15
the graph shows the height above ground, in meters, of a ball x seconds after the ball was launched upward from a platform. which statement is the best interpretation of the marked point (1.0, 4.8) in this context?
a) 1.0 second after being launched, the ball’s height above ground is 4.8 meters.
b) 4.8 seconds after being launched, the ball’s height above ground is 1.0 meter.
c) the ball was launched from an initial height of 1.0 meter with an initial velocity of 4.8 meters per second.
d) the ball was launched from an initial height of 4.8 meters with an initial velocity of 1.0 meter per second.

Explanation:

In a coordinate - pair $(x,y)$ on the graph, $x$ represents the time after the ball is launched and $y$ represents the height above the ground. For the point $(1.0,4.8)$, $x = 1.0$ seconds and $y=4.8$ meters. This means 1.0 second after being launched, the ball's height above ground is 4.8 meters.

Answer:

A. 1.0 second after being launched, the ball's height above ground is 4.8 meters.