Question

Given the linear equation x + y = 5, find the slope of its graph.

A. –5
B. –1
C. 1
D. 5

Answer 1

all you have to do is use one of the formulas for a linear equation. The easiest one is y=mx+b where x and y are coordinates or variables, m is the slope, and b is where the line crosses the y axis.
For x+y=5 we rearrange the eqaution, subtract x from each side so we have
y=-x+5, -x is the same as (-1)x , so the slope is -1.