Answer:
2 dogs
Step-by-step explanation:
2 dogs at 1st plus 7 dogs added equals 9
The line should go from (0,0) to (7,3.5)
The equation is Y = X(0.5)
prime (not composite) as it can only be divided by 1 and itself
I am attaching an image with the two solutions represented by the blue areas highlighted in your original graphs. Let me know if you have questions.