document.write( "Question 1179688: What is the area (in square units) of the region under the curve of the function f(x)=x+3, on the interval from x=1 to x=3?\r
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Algebra.Com's Answer #809268 by ikleyn(52797) $\"\"$ $\"About$

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document.write( "This shape is a trapezoid with one base (vertical) of f(1) = 1+3 = 4 units at x=1\r\n" );
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document.write( "and the other base (vertical) of f(3) = 3+3 = 6 units at x=3.\r\n" );
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document.write( "The height of the trapezoid is  3-1 = 2 units long (horizontally).\r\n" );
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document.write( "To find the area, apply the formula for the trapezoid area\r\n" );
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document.write( "    AREA =  = 4 + 6 = 10 square units.      ANSWER\r\n" );
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