Question

The number of screws and their price is given in the graph below. Find the unit rate.

• A. 0.3 dollar/unit
• B. 0.6 dollar/unit
• C. 0.9 dollar/unit
• D. 1.2 dollars/unit

Answer 1

The correct option is A 0.3 dollar/unit

Unit rate is the slope of the line.

From the graph, take one point (4,1.2)

Slope = $\frac{y}{x}$

= $\frac{1.2}{4}$

= 0.3

Hence, the price of a screw is
0.3 dollar/unit.