Monday, March 22, 2010

Math Reflection p. 32

1. a. To find the y-intercept and growth factor from a table you look at when x is 0 and that is the y-intercept. To find the growth factor from the table you have to figure out how it got from when x is 0 to when x is 1 and then try it out to see if the pattern continues. To fing the y-intercept on a graph you just find where y is when x is 0. To find the growth factor from a graph you have to look at some of the points and see how it is getting from one point to another like in the graph. To find the y-intercept from the equation a(b)^x, a is the y-intercept. The growth factor is b.

b. To write an equation from the y-intercept and the growth factor, you plug it into the equation a(b)^x. The y-intercept is a and the growth factor is b.

2. a. a=y-intercept and b=growth factor

b. a is the y-intercept on the graph. It is where y is when x=0.

c. b is the steepness of the graph.

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