Math

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1) Write the correct function rule that describes the relationship shown in the table below.

X f(x)
1 -1
2
3
4
5

  • Math -

    No functional "relationship" is shown, except at x=1. You need to complete the table.

  • Oops -

    The table is

    X f(x)
    1 -1
    2 2
    3 5
    4 8
    5 11

  • Math -

    trick:
    X f(x) then column of change in f(x)
    1 -1
    #### 3
    2 2
    #### 3
    3 5 a ha, change in y constant for 1 unit change in x so --- constant slope = 3/1 and form y = 3 x + b
    #### 3
    4 8
    #### 3
    5 11
    So put in a x and f(x)
    like (1,-1)
    -1 = 3 (1) + b
    b = -4
    so
    y = 3 x - 4

  • Math -

    thanks so much

  • Math -

    You are welcome :)

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