Question

The function y = -15x + 2100 can be used to model the height, y, of a parachute jumper x seconds after she jumps from an airplane.
What is the y-intercept of this function?

Answer 1

Answer:

2100 units

Step-by-step explanation:

We want to find the y-intercept of the function $y=-15x+2100$  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 $x=0$ into the equation.

$y=-15(0)+2100$

Multiply by zero to get:

$y=0+2100$

Add zero to obtain:

'$y=2100$

Therefore the y-intercept, which is the initial height is 2100