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?

2100 units

Step-by-step explanation:

We want to find the y-intercept of the function  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 into the equation.

Multiply by zero to get:

Add zero to obtain:

'

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

twenty-six miles over two gallons because the proportion for the original 13 miles to one gallon would be written 13/1 and, doing the same thing to the top and bottom, i multiplied by 2 and got 26/2