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11.Write the equations of linear and exponential functions that pass through the points (0,9) and (1,3)

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Answer:

y = -6x +9

y = 9·(1/3)^x

Explanation:

In each case, the y-intercept is 9.

Linear

The slope is rise/run = (3-9)/(1-0) = -6, so the equation is ...

y = mx + b . . . . . . . slope m, intercept b

y = -6x +9

Exponential

The ratio of value at x=1 to that at x=0 is 3/9 = 1/3. That is the "growth factor," so the equation is ...

y = 9·(1/3)^x

11.Write the equations of linear and exponential functions that pass through the points-example-1
User Kennet Celeste
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