The graph below shows the cost of pens based on the number of pens in a pack. What would be the cost of one pen A graph is shown with title Purchase of Pens. The horizontal axis label is Number of Pens, and the vertical axis label is Cost in dollars. Points are plotted on the ordered pairs 3, 3.75 and 6, 7.5 and 9, 11.25.

$1.25

Step-by-step explanation:

The graph shows that 3 pens cost $3.75 which means each pen costs more than $1 so we know that the greater number will be the numerator in our division equation. Divide 3.75 by 3 to get the unit rate.

3.75/3=1.25

Each pen costs 1.25

You can check your work by plugging it into the other points.

6*1.25=7.5 -So that second point is correct

9*1.25=11.25- The third point is also correct meaning we got the right answer

take it another

c.

step-by-step explanation:

because first you have to add the 4x, 9x, and the 7x together and you get 20x and then you add the last numbers up and you get 5and then you put the subtraction sign in there and that's how you get the answer.