Question

ms. walker, the physics teacher, wears a watch that counts her steps. today, while her first-period class does an experiment, ms. walker walks around the classroom, stopping several times to ask and answer questions. which graph could show the total number of steps ms. walker takes over the course of the experiment?

Explanation:

Step1: Analyze the situation

Ms. Walker walks around (steps increase) and stops (steps stay same) multiple times. So the graph should have increasing segments (when walking) and horizontal segments (when stopped).

Step2: Evaluate each graph

• First graph: Steps decrease, which is impossible (step count can't go down). Eliminate.
• Second graph: Constant slope changes, no flat parts (no stopping). Eliminate.
• Third graph: Has increasing parts (walking) and horizontal parts (stopping), matches the situation.
• Fourth graph: Steps decrease to zero, impossible. Eliminate.

Answer:

The third graph (with horizontal segments and increasing segments)