Question

The ordered pairs for two points are listed in the table. What is the equation, in slope-intercept form, of the line that contains these points? A. y = x + 1 B. y = -x – 1 C. y = -x + 1 D. y = x – 1

X Y
1 -2
4 -5

Answer 1

B. y = -x – 1

Explanation:

calculate slope =

y2-y1 = -5- (-2) = -3

x2-x1 = 4 - 1 = 3

m (slope) = -3/3 = -1

using points (1,-2) for calculating y-intercept:

y = mx + b

-2 = -1(1) + b

-2 = -1 + b

-1 = b

b = -1

answer is B y= -x - 1