1. Warm UpFeb. 24 th 1. Find the value of r so that the line that passes through (r, 3) and (5, 9) has a slope of m = 2. 2. In 1990, there were 80 people in the Hope Chorus. In 1999, there were 107 people in the chorus. Find the annual rate of change in the number of people in chorus. 3. Write the slope-intercept form of the equation of the line that passes through (0, 4) and (-3, -5)

2. Homework Answers 5.3

3. Homework Answers 5.3 (cont.)

4. Homework Answers 5.4

5. 5.4 Writing Equations in Point- Slope Form Three linear equation forms: 1. Slope-intercept y = mx + b 2. Standard Ax + By = C 3. Point Slope y – y 1 = m(x – x 1 )

6. Point-slope formula y – y 1 = m(x – x 1 ) *Just sub in the #’s for x 1, y 1 and m. Examples: 1. Write the point-slope form of an equation for a line that passes through (6, 1) and has a slope of.

7. Examples (cont.) Remember: X – (-9) = X + 9 2. Write the point-slope form of an equation for a horizontal line that passes through (4, -1). m = ?

8. Examples (cont.) 3. Write an equation in point-slope form of the line through the points (-3, -2) and (5, 3).

9. Point-Slope  Slope-Intercept Slope-Intercept: Example: 1. Write the equation in slope-intercept form. Get rid of parentheses and solve for y! To graph, turn equation into slope intercept form first!!

10. Point-Slope  Standard Standard Form: Example: 1. Write in standard form. Get rid of parentheses and make it look like standard form

11. Point-Slope  Standard Example (cont.): 2. GEOMETRY Use parallelogram ABCD. A parallelogram has opposite sides parallel. a) Write the point-slope form of the line containing AD. b) Write the standard form of the line containing AD.

12. You Try! Try each problem and if you get stuck, look back in your notes or the examples at the top. Show all your work so you can find your mistake if it is incorrect. When finished, turn in and start on your homework. Homework Workbook 5-4 Pg 151 and 153 ALL QUIZ MONDAY!! **progress reports**