Question 1100477
.
Wikipedia article ( https://en.wikipedia.org/wiki/Dead_Sea ) says 


<pre>
    The Dead Sea is a salt lake bordered by Jordan to the east and Israel and Palestine to the west. 
    Its surface and shores are 430.5 metres (1,412 ft) below sea level, Earth's lowest elevation on land.
</pre>

<pre>
The formula for Nour's altitude, that the problem is asking for, is

    A(t) = -400 + {{{(1400/2)*t}}}.


Indeed, it is a linear function of t (t is time in hours), which has the value of -400 meters at t= 0 (when Nour started her move) 

and the value of 1000 meters at t = 2 hours, when Nour arrived to Amman.


So the formula satisfies all conditions imposed to the function.
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Solved.