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# College Algebra K /DC Wedne sday, 23 October 2013 - PowerPoint PPT Presentation

College Algebra K /DC Wedne sday, 23 October 2013. OBJECTIVE TSW prepare for the TSI test. ASSIGNMENT DUE NOW (if you have not yet turned in) WS TSI Review #1  wire basket ASSIGNMENT DUE BY END OF PERIOD WS TSI Review #2 TSI TEST

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College Algebra K/DCWednesday, 23 October 2013

• OBJECTIVETSW prepare for the TSI test.

• ASSIGNMENT DUE NOW (if you have not yet turned in)

• WS TSI Review #1  wire basket

• ASSIGNMENT DUE BY END OF PERIOD

• WS TSI Review #2

• TSI TEST

• If you need to take it but do not take it at JV, you will need to go to Lone Star College and arrange to take it on your own.

Pelican Nebula

• Equations of Lines

• Slope-intercept Form:

y = mx + b

where m is the slope and b is the y-intercept.

• Examples

• What is the equation of the line with slope –4 and y-intercept 6?

• Examples

• What is the equation of the line that contains the points whose coordinates are (4, 1) and(–2, 5)?

First, find the slope.

Use the slope and one of the points to find b and write the equation. using (4, 1):

y = mx + b

• Equations of Lines (continued)

• Standard Form:

Ax + By = C

where A, B, and C areintegers.

• Example

What is the slope of the line whose equation is5x – 3y + 6 = 0?

Put into slope-intercept form to find the slope.

• Factoring

• ALWAYS look for a GCF first!

• Four terms:

• Grouping!

• Look for a pattern.

• Difference of squares:

• Difference of cubes:

• Sums of cubes:

• Perfect square trinomial:

• Solving a quadratic equation: Square root property.

• Use solution sets!

• Examples

• Solve:

• Solving a quadratic equation: Square root property.

• Use solution sets!

• Examples

• Solve:

• Solving a quadratic equation: Zero factor property.

• Example

Solve: