For two pounds it's $13.50. So 2.6 might be,$17.55. (Maybe) (But i'm pretty sure it's right.)
Hope I could hep. :)
Formula for midpoint is x+y divided by 2
4+8=12/2=6 is the midpoint
1+7=8/2=4 is the midpoint
A line parallel to x-2y=6 has which slope? Solving for y, -2y = 6 - x, and
m = -1 / -2, or 1/2.
Then the slope-intercept formula, y = mx + b, becomes 4 = (1/2)(2) + b, and b is 3. Thus, the equation of this line is y = (1/2)x + 3.
Check: does the point (2,4) satisfy this equation? Is 4 = (1/2)(2) + 3 true? YES.