Answer:
B
Step-by-step explanation:
the mean is calculated as
mean = 
this year's mean = 
= 
= 4.1
last year's mean = 
= 
= 3.1
difference = 4.1 - 3.1 = 1
Answer: 17x+9
Step-by-step explanation:
Answer: y = 2x-6
Step-by-step explanation:
So we need to write the equation of a line parallel to y=2x-1.
In parallel lines, the slope is the same, so in our new line the slope will be 2x.
We have the equation y = 2x right now. Let's plug in (4,2) for (x,y) and see if it works out, since it must pass through that point.
y = 2x
2 = 2 * 4
2 doesn't equal 8.
But if we subtract 6 from the right side of the equation -
y = 2x-6
then it checks out
2 = 2 (4) - 6
2 = 8 - 6
2 = 2
