Exponential Functions RED
If Sara bought some cryto coins for $120. The value of the coins increases at a rate of 9% per year. How much are the coins worth in 6 years?
$201.25
Max invested $5000 in a bind that pays 4% interest every 6 months. How much money will he have after 5 years?
about $6095
Which definition is correct for rate of growth
A)as the x value increases the y value decreases
B) as the x value increases the y value increases
B) as the x value increases the y value increases
What is the rate of growth/decay in the following expression?
y = 1400(0.92)t
8% decay
What is the general formula for exponential functions?
y=abx
The a in y=abx is the starting value
True or False
True
What does b represent in y=abx
A)starting value
B) the exponent
C) the rate of growth/decay
C) rate of growth and decay
What does the x represent in y=abx
A)rate of growth and decay
B)starting value/y intercept
C)the exponent/time
C) the exponent/time
Ollie borrowed $32000 to buy a new truck. With an interest rate of 8.9% compounded monthly, how much will Ollie repay after 6 years?
Round to the nearest whole dollar.
$54,476
Will invests $50000 in a mutual fund that pays 2.2% interest bimonthly. How much money will he have in five years?
about $55802
What is the rate of growth/decay in the exponential equation below?
y = 5575(0.6)t
40% decay
What is the initial value in the equation below?
y = 2250(1 - 0.9)t
2250
Civilians were able to purchase Hummers in 1992. If we were tracking the exponential growth in Hummer sales, is military data for Hummers from 1980-1991 relevant? Explain why or why not
No. No Hummers were sold prior to 1992.
the line on an exponential graph is called a parabola
true or false
false because parabolas are for quadratic functions
The ____ in y=abx acts as the y-intercept
A
Which of the following is an exponential function?
A tree growing 0.03 mm each month
A girl spending $78 each week on Tik Tok shop
A germ tripling daily in a science lab
A boy missing all the free throws in basketball game
A germ tripling daily in a science lab
What make a function an exponential function?
The equation has an exponent
All of the following indicate exponential decay EXCEPT which term?
decrease
depreciate
deposit
decay
deposit
A house is worth 9,000 dollars and the price increases by 20%. Which equation models the situation?
A) 9,000(0.8)
B) 9,000(1+.02)
C) 9,000(1.02)
D)9,000(1+0.2)
D)9,000(1+0.2 )
Your salary is $44000 and increases by 3% each year. What is your expected salary in 7 years? Round to the nearest whole dollar.
$54,114