The standard deviation of the pollution by-products released in the burning of 1 gallon of gas is 2.3 ounces. A random sample of 20 automobiles tested produced a standard deviation of 1.9 ounces. Is the standard deviation really less than previously thought? Use α = 0.05.

horizontal translation of 2 units in the positive x direction

followed by

vertical translation of 3 units in the positive y direction

the answer is d

step-by-step explanation:

y+3=-4(x-2)

y+3=-4x+8

  -3         -3  

y=-4x+5

-2

7 - 9 = -2

reversed:

-2 + 9 = 7

55 degrees because 55+55=110 degrees