Algebra Big Ideas

Based on the calculator screenshot,

b=23.16 indicates that...

• the slope equals 23.16

• the y-intercept equals 23.16

• the residual equals 23.16

• the correlation co-efficient equals 23.16

Enter the information into a graphing calculator.

Use the "LinReg(ax+b)" screen to determine

the slope of the line of best fit.

• 1.38

• 15.68

• .997

• .999

Enter the information into a graphing calculator.

Use the "LinReg(ax+b)" screen to determine

the correlation co-efficient?

• 1.38

• 15.68

• .997

• .999

Complete the square for
x² + 12x + ____

• x² + 12x + 144

• x² + 12x + 36

• x² + 12x - 36

• x² + +12x - 144

Solve using the quadratic formula.
2x² - 9x - 35 = 0

• x = 7/2, x = -6

• x = -5/2, x =5

• x = -3/7, x =6

• x = -5/2, x = 7

Simplify the radical...

√20a²b⁴

• 2ab²√5

• 4ab²√5

• 5ab²√2

• 2a²b²√5

Simplify.

• 
• 
• 
• 

When factoring
x² - 4x + 4 = 20,
what goes in the blank?
(x - __ )² = 20

• 4

• 2

• 8

• 20

Determine the values of a, b, and c for the quadratic equation:

4x² – 8x = 3

• a = 4, b = -8, c = 3

• a = 4, b =-8, c =-3

• a = 4, b = 8, c = 3

• a = 4, b = 8, c = -3

The discriminant is

• ax²  + bx  +  c

• b - 4ac

• b² - 4ac

• b² + 4ac