Slippery slopes Download

Christina Cacioppo

doubles, variables, basic math Student approved


Introduction

Remember the function to find the slope of a line given two points?

Divide the difference of the two y values (the rise) by the difference between the two x values (the run): (y2 - y1)/(x2 - x1)

Let's write a program to calculate the slope of a line for us, if we give it two points.


Task

In the program, the points (x1, x2) and (y1, y2) are stored as four doubles called x1, x2, y1, and y2.

On line 9, write the general equation for a slope, in terms of x1, x2, y1, and y2. Then, run the program and check out the slope you just calculated!


Starter code

class Slopes{
	public static void main(String[] args){
		double x1 = 3;
		double y1 = 3;
		double x2 = 4;
		double y2 = 2;

		double slope = // equation for slope between (x1, y1) and (y1, y2) here

		System.out.println("The slope is " + slope);
	}
}

Expected output

The slope is -1

One solution


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