Claire is hiking up the South Kaibab Trail at the Grand Canyon. The table shows Claire’s altitude above sea level every 15 minutes after she starts to hike. Use a graph and an equation to find how long it will take Claire to reach the rim of the canyon at 7260 feet.
The table shows a linear relation. The slope is (3240-2940)/(30-15) = 300/15 = 20. The equation is f(x) = 20x + 2640. To reach 7260 feet: 7260 = 20x + 2640 20x = 4620 x=231 minutes
