Question

The following graph shows the relation between number of screws and the price of the screws. Find the unit rate.

• A. 0.15 dollars per unit
• B. 0.20 dollars per unit
• C. 0.30 dollars per unit
• D. 1.5 dollars per unit.

Answer 1

The correct option is A 0.15 dollars per unit

Unit rate is the slope of the line.

To find the slope, take one point (20,3) on the graph.

Slope (m) = $\frac{y}{x}$

= $\frac{3}{20}$

= 0.15

Hence, the unit rate is 0.15 dollars per unit.