Algebraic Reasoning Test 1

Which formula is used to find the explicit equation for geometric sequences?

• a_n = a_n-1 + d
• a_n = a_n-1 * r
• a_n = a₁ + d(n-1)
• a_n = a₁ * r^n-1

The next two terms of the sequence 4,7,10,13 are

• 16 and 19
• 15 and 19
• 16 and 18
• 15 and 18

Tags

CCSS.HSF.BF.A.2

What is the slope of this relationship?

• Slope = 8
• Slope = 8/2 = 4
• Slope = 2
• Slope = 2/8 = 1/4

Tags

CCSS.8.EE.B.5

What is the equation of the relationship?

• y = 8x + 3
• y = 4x
• y = 4x + 3
• y = 8x

Classify the model as Exponential GROWTH or DECAY.
A=1200(.85)⁶

• Growth
• Decay

Write the equation for the table?

• y = 2(20)^x
• y = -2(20)^x
• y = 20(2)^x
• y = 20(.5)^x

How do you find the c in a quadratic function, f(x) = ax² + bx + c?

• 2a = second difference

• 6a + 2b = second difference

• y-intercept

• a + b = first difference

Write an equation for the quadratic table.

• f(x) = 2x² + 3x +1

• f(x) = 3x² - 3x + 1

• f(x) = 4x² + 2

• f(x) = (x² + x)/2

What is the third difference of the cubic table?

• 12

• 8

• 6

• -12

Write an equation for the cubic function.

• f(x) = 2x³

• f(x) = 3x³ - x + 9

• f(x) = -1/2x³ + 3x² - 1

• f(x) = 4x² - 2