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

2100 units

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