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# Review Of Slope And The Slope Intercept Formula

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### Transcript

• 1. Review of Slope and the slope intercept formula y=mx+b
• 2. What is the slope of the line that contains these points?
• Point A (0,3)
• Point B (2,2)
• +2
• +3
A B
• 3. The slope of this line is..
• +2
• +3
A B
• 4. What is the slope of this line?
• -2
• +2
• 5. What is the slope of this line?
• -2
• +2
• 6. What is the slope of this line?
• +2
• +1
• 7. What is the y -intercept of this line?
• In other words, at what coordinate does the line cross the y-axis?
• y intercept is -5
y axis x axis
• 8. What is the y -intercept of this line?
• At what coordinate does the line cross the y-axis?
• y intercept is 0
y axis x axis
• 9. What is the y -intercept of this line?
• At what coordinate does the line cross the y-axis?
• y intercept is +5
y axis x axis
• 10. What is the y -intercept of this line?
• At what coordinate does the line cross the y-axis?
• y intercept is -2
y axis x axis
• 11. How to write the equation for this line
• -2
• +2
• 12. Write an equation for this line.
• +2
• +3
• 13. What is the slope of this line?
• +2
• +1
• 14. Write an equation for this line. y axis x axis
• 15. Write an equation for this line. y axis x axis
• 16. What is the slope of this line?
• 17. What is the slope of this line?
• 18. Review Part Two Finding Slope without Graphing
• 19. When you are given two points you may have to find the slope...
• Point A (2,-3)
• Point B (3,4)
• … without graphing.
A B
• 20. Find the slope when you are given two points from a line.
• Point A (2,-3)
• Point B (3,4)
• Use the formula for slope.
• Remember, m=slope .
• 21. Find the slope when you are given two points from a line.
• Point 1 (2,-3)
• Point 2 (3,4)
• Use the formula for slope.
• Remember, m=slope .
• 22. Using the same points, but labeling them #2 and #1
• Point 2 (2,-3)
• Point 1 (3,4)
• Use the formula for slope.
• Remember, m=slope .
• 23. Find the slope when you are given the following two points from a line.
• Point C (-2,-6)
• Point D (3,5)
• Use the formula for slope.
• Remember, m=slope .
• 24. Find the slope when you are given the following two points from a line.
• Point E (9,6)
• Point F (1,4)
• Use the formula for slope.
• Remember, m=slope .
• 25. Review Part Three Finding the equation from two given points from the line
• 26. Find the Linear Equation
• Point E (9,6)
• Point F (1,4)
• You found the slope (m) to be ¼.
• Insert ¼ as m in the slope intercept formula.
• Let’s pick the x and y values from Point F and insert them into the formula. (1,4)
• 27. Write the Linear Equation
• Point E (9,6)
• Point F (1,4)
• Now use the value for the slope (m) and y-intercept (b) to rewrite the formula.
• 28. Write the Linear Equation
• Use points R and S
• Point R ( 5 , 3 )
• Point S ( 1 , 7 )
• Reminder : ( x , y )
• Substitute the values for Point R.
• 3 = -1( 5 ) + b
• 3 = -5 + b
• (Add 5 to both sides)
• 29. Write the Linear Equation
• Use points W and T
• Point W ( -4,-3 )
• Point T ( -2,-6 )
• Substituting the values for Point T…
• -6 = - 3 / 2 (-2) + b
• -6 = +6 / 2 + b
• (Subtract 3 from both sides)
• 30. Review Part Four Find the x and y intercepts
• 31. Given: y = -3x + 12
• Use zero as the x value.
• y = -3(0) + 12
• y = 12
• Replace (x,y) with 0 and 12.
• (0,12)
• Use zero as the y value.
• 0 = -3x + 12
• Subtract 12 from both sides
• - 12 = -3x
• Divide both sides by -3
• - 12 = -3x
• -3 -3
• -4 =x
• Replace (x,y) with -4 and 0.
• (-4,0)
• 32. Given: y = -4x + 8 Find the x and y intercepts.
• Use zero as the x value.
• Then use zero as the y value.
x intercept is (0,-8) y intercept is (2,0) 0 ? ? 0 y x
• 33. Assignment
• Page 751 top
• #1-15
• Page 751
• bottom
• #1-4
• Page 752 Top
• #19-27