Ahandicapped-access ramp starts at ground level and rises 27 inches over a distance of 30 feet. what is the slope of this ramp?

What is the explicit formula for this sequence? -7, -4, -1, 2, a.) an = 8 + (b - 1)3 b.) an = -7 + (n - 1)3 c.) an = 3 + (n -1) (-7) d.) an = -7 + (n - )