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Linear vs. exponential growth: from data | High School Math | Khan Academy

Linear vs. exponential growth: from data | High School Math | Khan Academy


Comments (3)

  1. how do you know it's 4t?? I thought it is 3t since the year gap is 3 years

  2. Just by looking at the table(left), we need a function that is equal to 34 branches when t=0 and has an average rate of change of 12 branches for every 3 years. So B(t)=34+4(t). This function is equal to 34 when t is 0 and adds 12 for every three years(t). B(3)=34+4(3)=34+12=46

    B(6)=34+4(6)=34+24=58

    B(6)-B(3)=58-46=12

    So this function does increase by 12 branches for every 3 years, which is what we need since Sal calculated that the average increase in branches for every 3 years is 12 branches.

  3. omg what he s saying I didn't cach any thing
    its really confusing me 🙁

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