That is what I got, when working it out.
The answer is 50 because 5 x 10 is 50.
Lets calculate the taxes that would been payed at each city:
city1 = 12000(7%) = 12000(0.07) = 840
city2 = <span>12000(8.5%) = 12000(0.085) = 1020
So if you go to city1 instead of city2, you save 1020 - 840 = 180
So you would save $180 from $12000, that is:
180 out of 12000
= 180/12000
= 0.015
and that is the 1.5%, that is what you could save</span>
Vertex is (1,-4 )The parabola is going up
Yes.
It's a proportional relationship because when graphing this problem on the graph the line goes through (0,0). Therefor it is a proportional relationship. Some problems like these won't be a proportional relationship because it's not going through (0,0).