Question

If a graph between two quantities on a coordinate plane is a straight line passing through the origin and the point
$(1,r)$, then $r$ is the ______.

• A. length
• B. origin
• C. unit rate
• D. abscissa

Answer 1

The correct option is C unit rate

If a graph between two quantities on a coordinate plane is a straight line passing through the origin and the point
$(1,r)$, then $r$ is the $\text{unit rate}$.
Note: A straight line passing through the origin represents $(x,y)$ where $x=1$ and $y=r$, and the slope or unit rate is y per unit of $x$. We call ‘‘$r$’’ the unit rate when the second quantity $\left(x\right)$ is one.