Back to Create equations in two or more variables — Problem 3 · Task Set 25

HSA.CED.A.2 Tutor Intake — Two-Variable Equations and Graphs

This short check helps your tutor understand where to start. Answer each question on your own. If you are not sure, give your best try — every response helps your tutor plan your sessions.

Grade 9·8 problems·~12 min·Common Core Math - HS Algebra·standard·hsa-ced-a-2

Work through problems with immediate feedback

Concepts

A student graphs $V = 500 - 20t$ and marks only the points
$(0, 500)$ , $(5, 400)$ , $(10, 300)$ , $(15, 200)$ , $(20, 100)$ ,
and $(25, 0)$ as separate dots, leaving gaps between them.

Which statement best identifies the error?

The student marked too many points; only the intercepts are needed.

The student should connect the dots with a line because the tank
drains continuously — every value of $t$ between 0 and 25 has a
corresponding volume.

The student's approach is correct; only whole-minute values of $t$
make sense for a draining tank.

The student should remove the point $(0, 500)$ because the tank
starts full and does not drain at $t = 0$ .