Question

1. The line through A and B has a slope = _____ and y-intercept = _____

2. Write an equation for this line. ________​

Answer 1

1. slope= 1/2; y intercept=3

2. y= 1/2x+3

Explanation:

The slope is equal to the y value of b minus the y value of a OVER the x value of b minus the x value of b. This simplifies to 1/2.

If the slope is 1/2, you can see that for every 1 that the line rises, its x value increases by 2. Since you know the when the x value is 2, the y value is 4, decreasing the x value by 2 (making it 0) would make the y value 3.