Answer:
2100 units
Step-by-step explanation:
We want to find the y-intercept of the function [tex]y=-15x+2100[/tex] which can be used to model the height, y, of a parachute jumper x seconds after she jumps from an airplane.
To find the y-intercept, you substitute [tex]x=0[/tex] into the equation.
[tex]y=-15(0)+2100[/tex]
Multiply by zero to get:
[tex]y=0+2100[/tex]
Add zero to obtain:
'[tex]y=2100[/tex]
Therefore the y-intercept, which is the initial height is 2100
