Write an equation for the line of best fit based on the trend line drawn. Use the points (65, 205) and (69, 220) to find the slope of the equation. y = __ x - 49 Based on the trend line (not the equation), what is the expected value of y when x = 74? The expected value of y is __
To find the slope of the equation, we first use the points (65, 205) and (69, 220) to find the slope:
Slope = (220 - 205) / (69 - 65) = 15 / 4 = 3.75
Therefore, the equation becomes y = 3.75x - 49.
Based on the trend line (not the equation), the expected value of y when x = 74 would be:
y = 3.75*74 - 49 = 277.5 - 49 = 228.5
Therefore, the expected value of y when x = 74 is 228.5.