Answer:
Step-by-step explanation:
Use the slope formula
(x2-x1)/(y2/y1)
substitute the values
(1-10)/(9-7)
solve
-9/-2
simplify
9/2 or 4.5
For this case we must find the solution of the following system of equations:

If we multiply the first equation by -2 we have the following equivalent system:

If we add the equations we have:

Thus, the system has infinite solutions.
Answer:
Infinite solutions
Based on the given description above, the answer for this would be the term DEMAND. Demand is defined as the consumers' <span>willingness to pay depends on what income and prices of related goods. Hope this is the answer that you are looking for. Have a great day ahead!</span>
none I think it's the answer is 2