Answer:
-6mph
Step-by-step explanation:
45 is 3/4hour so -8 times 3/4= -24/4=-6mph
The average rate of change obtained from the ratio of change in y to the change in x is 27
The average rate of change can be obtained using the relation :
Rate of change = (y2 - y1) ÷ (x2 - x1)
at; x1 = -3
y1 can be calculated from the function ;
y1= 3(-3³)-1
y1=-82
At ; x2 = 3
y2 can be calculated from the function ;
y2 = 3(3³)-1
y2=80
The rate of change can be calculated thus : (y2 - y1) ÷ (x2 - x1)
[80-(-82)]/[3-(-6])
162/6
27
Learn more about the average rate of change here:
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The mean increases when the outlier is removed
That is true because you are still dividing x by three either way
X^2-9=0 add 9 to both sides
x^2=9 take the square root of both sides
x=±3