January 30, 2015

30

Category # of Assignments Weight

Class Work 10 Graded 20%

Home Work 18 Topics 20%

Tests6;

(5 counted)40%

Notebook 1 10%

Final Exam 2 Parts .05% Each

Grades & Weighting: All Quarters

Mrs. Wright rents a car to see her friend Mrs. Wong. The cost is $32.00 plus $.75 a mile. The trip is 45 miles each way. What is the total cost for Wright to see Wong?

A. $32.75 B. $99.50 C. $75.00 D. $65.75 E. None

4 Most Missed Questions from Final Exam

#4; Version 1: 39% correct

#3; Version 1: 37% correct

Solve for p: A = (ap + pH)

A) p = a + H B) p = A C) p = A – a D) p = H - a E. NoneA a + H H A

4 Most Missed Questions from Final Exam

#2; Version 2: 36% correct

A. 125% B. 90% C. 55% D. 80% E. None

4 Most Missed Questions from Final Exam

#1; Version 4: 26% correct

A. −𝟑

𝟓B.

𝟏

𝟏𝟎C.

𝟏

𝟓D.

𝟏

𝟐𝟎E.

−𝟐

𝟓

What is the slope of the line 𝟒𝒚 + 𝟑 =𝟏

𝟓𝒙?

Parallel lines have the same slopes so find the slope of the given line and the slope you want for a parallel line will be the same.

Perpendicular lines have negative reciprocal slopes. take the slope of the given line, switch the numerator and denominator and change the sign for the slope of its perpendicular line.

Parallel & Perpendicular Lines:

Practice Problems:

EXAMPLE 2

Determine whether lines are parallel or perpendicular

Line a: y = 5x – 3

Line b: x + 5y = 2

Line c: –10y – 2x = 0

SOLUTION Find the slopes of the lines.

Write the equations for lines b and c in slope-intercept

form.

EXAMPLE 2

Line b: x + 5y = 2 5y = – x + 2

Line c: –10y – 2x = 0 –10y = 2x y = – x15

Determine whether lines are parallel or perpendicular

xy =25

15 +–

Line a: The equation is in slope-intercept form.The slope is 5.

Determine which lines, if any, are parallel or perpendicular.

Line a: 2x + 6y = –3 Line b: y = 3x – 8

Line c: –1.5y + 4.5x = 6

ANSWER

parallel: b and c; perpendicular: a and b, a and c

Final Question:

Class Work:

3-1 Front side is a review of

coordinate plane thus far

Back side is Parallel/Perpendicular