Studies show that gasoline use for compact cars sold in the united states is normally distributed, with mean of 25.5 miles per gallon (mpg) and a standard deviation of 4.5 mpg. if a manufacturer wishes to develop a compact car that outperforms 95% of the current compacts in fuel economy, what must the gasoline use rate for the new car be?
the aswer is c
to solve this question, all you need to do is put the x coordinate in for x and the y coordinate for y. (x,y) we need to find the equation that is less than or equal to 3.
reflect over the x-axis means to switch the sign of the y coordinate:
reflect over the y-axis means to switch the sign of the x coordinate:
reflect over the both axes means to switch the sign of both coordinates:
plot these points on a graph and you'll see that you obtained a rectangle