Answer:
$0.50
Step-by-step explanation:
We can solve this two different ways: from the graph or algebraically.
Graphing:
Essentially, in order to find the cost of 1 pen, we just need to look at x = 1 on the x-axis and see what y-coordinate corresponds to x = 1 on the line.
Doing so, it looks like the price of 1 pen is about $0.50.
Algebraically:
We have the proportion:
[tex]\frac{1}{2} =\frac{x}{1}[/tex] , where x is the price of 1 pen
Cross-multiply:
2 * x = 1 * 1
2x = 1
Divide by 2:
x = 1/2 = 0.5
So, we know that the unit rate of price per pen is $0.50.
