Question

40 what is the slope of the line?
25
what does the slope tell you?
silver costs $______ per ounce.
(the chart shows a line graph with x-axis labeled \amount (oz)\ and y-axis labeled \cost ($)\, with the line starting at (0,0))

Explanation:

Step1: Identify slope formula

Slope $m = \frac{\Delta y}{\Delta x} = \frac{y_2 - y_1}{x_2 - x_1}$

Step2: Pick graph points

Use $(x_1,y_1)=(0,0)$ and $(x_2,y_2)=(2,50)$

Step3: Calculate slope

$m = \frac{50 - 0}{2 - 0} = 25$

Step4: Interpret slope meaning

Slope = cost per ounce of silver

Answer:

1. The slope of the line is 25.
2. The slope tells you the cost per ounce of silver.
3. Silver costs $\$25$ per ounce.