Posted by **peter** on Wednesday, December 8, 2010 at 1:09pm.

Find the area of the region under the graph of the function f on the interval [-1, 2].

f(x) = 6x + 1

bound by the x axis

- integration -
**Reiny**, Wednesday, December 8, 2010 at 1:29pm
Peter, if you are the "anonymous" of

http://www.jiskha.com/display.cgi?id=1291829564

you did not follow my instructions.

the line crosses at x = -1/6, so if the x-axis is the boundary, there are 2 different triangles to consider

left triangle:

base = 5/6

height = 5, Area = (1/2)(5/6)(5) = 25/12

right triangle:

base = 13/6

height = 13 , Area = (1/2)(13/6)(13) = 169/12

total = 25/12 + 169/12 = 97/6

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