The table below shows changes in the area of several trapezoids as the lengths of the bases, b1 and b2, remain the same and the height, h, changes. Trapezoidsb1 (in feet)b2 (in feet)h (in feet)A (in square feet)57212574245763657848Which formula best represents the relationship between A, the areas of these trapezoids, and h, their heights?

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The table below shows changes in the area of several trapezoids as the lengths of the bases, <i class='calibre12'>b</i><sub class='calibre36'>1</sub> and b<sub class='calibre36'>2</sub>, remain the same and the height, <i class='calibre12'>h</i>, changes. <br><table border='1' cellpadding='0' cellspacing='0' class='msotablegrid'><tbody><tr><td class='calibre40' colspan='4'><p>Trapezoids</p></td></tr><tr><td class='calibre41'><p><b><i class='calibre12'>b</i><sub class='calibre36'>1 </sub>(in feet)</b></p></td><td class='calibre43'><p><b><i class='calibre12'>b</i><sub class='calibre36'>2 </sub>(in feet)</b></p></td><td class='calibre43'><p><b><i class='calibre12'>h</i> (in feet)</b></p></td><td class='calibre44'><p><b><i class='calibre12'>A</i> (in square feet)</b></p></td></tr><tr><td class='calibre45'><p>5</p></td><td class='calibre46'><p>7</p></td><td class='calibre46'><p>2</p></td><td class='calibre47'><p>12</p></td></tr><tr><td class='calibre45'><p>5</p></td><td class='calibre46'><p>7</p></td><td class='calibre46'><p>4</p></td><td class='calibre47'><p>24</p></td></tr><tr><td class='calibre45'><p>5</p></td><td class='calibre46'><p>7</p></td><td class='calibre46'><p>6</p></td><td class='calibre47'><p>36</p></td></tr><tr><td class='calibre45'><p>5</p></td><td class='calibre46'><p>7</p></td><td class='calibre46'><p>8</p></td><td class='calibre47'><p>48</p></td></tr></tbody></table><br><br>Which formula best represents the relationship between <i>A</i>, the areas of these trapezoids, and <i>h</i>, their heights?