Question

arianna throws a ball up in the air. the graph below shows the height of the ball h in meters after t seconds. how many seconds have gone by when the ball is at its highest point?

Explanation:

Step1: Identify highest - point on graph

The highest point of the graph of height $h$ vs time $t$ is the vertex. The vertex of the given parabola is the point $(1,4.9)$.

Step2: Determine the time value

The $x$ - coordinate of the vertex represents the time $t$ when the ball is at its highest point. The $x$ - coordinate of the vertex $(1,4.9)$ is $1$.

Answer:

$1$