1. The graph shows the average price of stock each year for 11 years.
Which statements are true?
The price of the stock increased the first 3 years.
The price of the stock never fell below its original value.
The average price in year 11 was less than the relative maximum price between years 1 and 5.
The value of the stock is negative between the third year and midway between the eighth and ninth year.
The stock started to increase again between the eighth and ninth year.
2. Consider two functions: g(x)=20(1.5)x and the function f(x) shown in the graph.
Which statements are true?
g(x) has a greater y-intercept than f(x).
f(x) and g(x) are negative when x is less than 0.
f(x) and g(x) are both increasing on the interval (−∞, ∞) .
f(x) increases at a faster rate than g(x)does on the interval (−5, −3) .
1.
The price of the stock increased the first 3 years.
True
The price of the stock never fell below its original value.
True
The average price in year 11 was less than the relative maximum price between years 1 and 5.
False
The value of the stock is negative between the 3rd year and midway between the 8th and 9th year.
False
The stock started to increase again between the 8th and 9th year.
True
2.
And g(x) = 20(1.5)x
g(x) has a greater y-intercept than f(x).
the y-intercept of g(x) = g(0) = 20(1.5)0 = 20
the y-intercept of f(x) = 15
20 is greater than 15 , so
True
f(x) and g(x) are negative when x is less than 0.
False – there are no values that cause f(x) or g(x) to be negative.
f(x) and g(x) are both increasing on the interval (−∞, ∞) .
True
f(x) increases at a faster rate than g(x) does on the interval (−5, −3) .
This is harder to tell....
rate of increase of f(x) on the interval looks like about 0.1
rate of increase of g(x) on the interval ≈ 1.646
so I think its
False
I believe that hectictar's last answer is correct , as well
It appears that f(x) might be = 15(2)^x since the points (0, 15) and (1, 30) are on the graph
Rate of change on -3 to -5 for f(x) =
[ 15(2)^(-3) - 15 (2)^(-5) ] / [ -3 - - 5 ] = ( 15/8 - 15/32 ) / 2 ⇒ 0.703
Rate of change on -3 to - 5 for g(x)
[ 20(1.5)^(-3) - 20(1.5)^(-5) ] / [ - 3 - - 5 ] = (160/27 - 640/243 ) / 2 ⇒ 1.646
So....."False" seems correct