TEKS.MATH.9-12.VII.C

The value of a car is $15,000 and depreciates at a rate of 8% per year. What is the exponential equation?

• y=8(15,000)^x
• y=15,000(1.08)^x
• y=15,000(0.92)^x
• y=15,000(0.08)^x

Tags

TEKS.MATH.9-12.VII.C

y varies inversely as x, if y = -3 when x = -6, find y when x = 14.

• 11
• -11
• 9/7
• 7/9

Tags

TEKS.MATH.9-12.VII.C

James' 70 in. giant peach doubles in size every week. Write an expression that would represent how big the peach is after 5 weeks.

• y = 70(2)³⁵
• y = 70(2)⁵
• y = 2(70)⁵
• y = 5(70)²

Tags

TEKS.MATH.9-12.VII.C

In a direct variation, y = 39 when x = 3. 
Find the value of y when x = 2.

• 26
• 3
• 58.5
• 2

Tags

TEKS.MATH.9-12.VII.C

Write an equation

m = 5/4 through (-4, -3)

• y = 5/4x +2

• y = -5/4x + 2

• y = 2x - 5/4

• y = 3/4x + 2

Tags

TEKS.MATH.9-12.VII.C

A rock is dropped from a bridge 320 feet above a river. The pathway that the rock takes can be modeled by the equation h = -16t² + 320. How long will it take the rock to reach the river (ground)?

• 4.5 seconds

• 2.5 seconds

• 3.8 seconds

• 3.5 seconds

Tags

TEKS.MATH.9-12.VII.C

Write the equation of a line that goes through the points (9, -2) and (-3,2) in slope intercept form.

• y=-⅓x+1
• y=⅓x+1
• y=-3x+25
• y=3x-29

Tags

TEKS.MATH.9-12.VII.C

The city of Whoville has been much more stable since the Grinch turned his life around. The population of 900 is increasing at a rate of 7.5% per year. If the population continues growing at the same rate, how many people will there be in 11 years?

• 424288

• 1994

• 10642

• 900

Tags

TEKS.MATH.9-12.VII.C

Find the inverse function

• f ^-1(x) =(1/x) − 5

• f ^-1(x) =(1/x) + 5

• f ^-1(x) = (x/1) − 5

• f ^-1(x) =(5/x) − 1

Tags

TEKS.MATH.9-12.VII.C

What does P represent in the equation A=P(1+r)^t

• rate

• principal

• time

• amount

Tags

TEKS.MATH.9-12.VII.C