The answer for that is .. 17?
Slope-intercept form:
y=mx+b
m=slope
b=y-intercept
We have this line: y=9x+3; a line parallel to this line (y=9x+3) will have the same slope; therefore m would be equal to 9 (m=9).
Data:
m=9
b=-2
y=mx+b
y=9x-2
Answer: y=9x-2
Blinding is part of this, as the participants do not know whether they received the competitor's product.
Answer:
The equation i came up with is $55= 7.8x - 47.20
