Question 1197072
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Hi
D = −30t
Graph this equation for 0 ≤ t ≤ 150.
{{{drawing(300,300,  -100, 150, -4500, 0, grid(1), blue(line(2.5,6,2.5,-6)) ,
circle(84, -2520,5),

graph( 300, 300, -100, 150, -4500, 0,0, -30x)) }}}
The ordered pair(84, −2520)is on the graph. 
Write a sentence that describes the meaning of this ordered pair.
After 84min, Alvin is -2520m below sea level.