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Big Ideas Math Integrated I, 2016

BI

Big Ideas Math Integrated I, 2016 View details

1. Exponential Functions

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Exercise 48 Page 279

Determine the ratios of consecutive y-values and find the y-intercept.

y=- 50(0.2)^x

Practice makes perfect

We want to write an exponential function represented by the given table. To do so, let's calculate the increase in the x-values and the ratio between consecutive y-values.

The y-values change by a factor of 0.2 as x increases by 1. Moreover, note that when x=0, we have that y=- 50. This means the y-intercept is - 50. We have enough information to write the exponential function. y= - 50( 0.2)^x

Subchapter links

Communicate Your Answer p.273

Monitoring Progress p.274-277

Exercises p.278-280