Final answer:
The equation y = 2x - 2 is a linear equation with a slope of 2 and a y-intercept of -2. To find a missing y value, substitute an x value and solve. Lines Y2 and Y3 relate to the line of best fit and include adjustments to their y-intercepts, likely for statistical intervals.
Step-by-step explanation:
The equation provided, y = 2x - 2, represents a linear function, which is a topic typically studied in high school mathematics. A linear equation of the form y = mx + b has a slope (m) and a y-intercept (b). In this case, the slope is 2, and the y-intercept is -2. To find the missing value of y, one must substitute a specific value of x into the equation and then calculate the corresponding value of y.
Regarding the other information provided about the lines Y2 and Y3, they both have the same slope of 4.83, which matches the slope of the line of best fit, y = -173.5 + 4.83x. The differences in these equations lie in their y-intercepts. For Y2 and Y3, they have been adjusted by subtracting and adding 2(16.4) respectively. This most likely represents confidence or prediction intervals around the line of best fit in statistical analysis.