Please help me answer and solve this problem

$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:

, 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.

c-   36

taxicab circle radius 9 has 4(9) = 36 points