Explanation:
The formula i.e.
Fuel Efficiency = 32-0.1*speed
represents that the efficiency on very lower speeds will be affected very minor as the multiple of 0.1 which will be subtracted from 32 will be small value.
Secondly, as per attached full question and graph plot, it is clear that up to 26.5 predicted (mpg), the trend of Residual (mpg) is increasing while after 26.5, it starts to decrease nearly linearly.
It's slop can be find out by two point formula i.e.
slope = m =(y2-y1)/(x2-x1)
=(1-2.5)/(27.5-27)
=(-1.5)/(0.5)
=-3
negative sign shows decreasing trend of second half plot
Step-by-step explanation:
17) no problem were noticed, just:
reflecting across Y-axis changes the coordinate 'x', no changes for coordinate 'y';
reflecting across X-axis changes the coordinate y, no changes for coordinate 'x'.
For more info see the attached picture.
