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anonymous

  • one year ago

need help

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  1. anonymous
    • one year ago
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  2. anonymous
    • one year ago
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    @welshfella can you help me ?

  3. welshfella
    • one year ago
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    sorry that diagrams too small for my old eyes!!

  4. anonymous
    • one year ago
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    i can make it bigger

  5. anonymous
    • one year ago
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  6. anonymous
    • one year ago
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    is that better

  7. welshfella
    • one year ago
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    yes just about one of the general form s of an equation of a straight line is y = mx + b where m = slope and b = intercept on y axis so an equation with slope 2 and y-intercept -2 would be y = 2x - 2

  8. welshfella
    • one year ago
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    these 2 lines on your graph are parallel so they have the same slope If you count the squares vertically and horizontally form the same points you can find the slope

  9. welshfella
    • one year ago
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    |dw:1433104007663:dw|

  10. welshfella
    • one year ago
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    slope (m) = RISE/RUN b = y intercept

  11. anonymous
    • one year ago
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    i still dont get it

  12. welshfella
    • one year ago
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    Look at the top point of the blue line and count the number of squares until you get to the horizontal x-axis then count squares to the left until you come to point where the blue line cuts the x axis what counts do you get ?

  13. anonymous
    • one year ago
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    6,2

  14. welshfella
    • one year ago
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    |dw:1433104418815:dw|

  15. welshfella
    • one year ago
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    6 is right - not 2

  16. anonymous
    • one year ago
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    3

  17. welshfella
    • one year ago
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    yep so the slope = 6/3 = 2

  18. welshfella
    • one year ago
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    and where do the lines cut the y axis -at what value of y?

  19. welshfella
    • one year ago
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    |dw:1433104647687:dw|

  20. anonymous
    • one year ago
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    1,3

  21. welshfella
    • one year ago
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    not 1 and 3 - they are below the 0 point

  22. anonymous
    • one year ago
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    -1.-3

  23. welshfella
    • one year ago
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    - on negative part of the y-axis

  24. welshfella
    • one year ago
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    yes so the 2 equations are y = 2x - 1 and y = 2x - 3

  25. welshfella
    • one year ago
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    I know they are not written in the same form as the above - which ones are they in the options?

  26. anonymous
    • one year ago
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    could you hep with this one

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  27. welshfella
    • one year ago
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    no i gotta go right now - the correct equations for the last question are the first and second on the list

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