I think it’s acute but I hope you get it right!!
I believe the answer is C.
C is total cost, e is the number of enlargements.
c=10e + 50
Plug in the total cost to find the number of enlargements
180=10e +50
Subtract 50 from both sides
130=10e
Divide each side by 10 and you are left with
13=e
The number of enlargements for $180 is 13.
Hope I helped!
When two variables are related in such a way that the ratio of their values always remains the same, the two variables are said to be in direct variation.
In simpler terms, that means if A is always twice as much as B, then they directly vary. If a gallon of milk costs $3, and I buy 1 gallon, the total cost is $3. If I buy 10 gallons, the price is $30. In this example the total cost of milk and the number of gallons purchased are subject to direct variation -- the ratio of the cost to the number of gallons is always 3.
To be more "geometrical" about it, if y varies directly as x, then the graph of all points that describe this relationship is a line going through the origin (0, 0) whose slope is called the constant of variation. That's because each of the variables is a constant multiple of the other.Hope I helped