Question

I am terribly at geometry. Was always good at basic algebra. But not understanding this question

Find the slope of a line parallel to 3x + y = 15
A. 1/3
B. -2/5
C. -3
D. 5

Answer 1

3x+y=15
First convert the equation into slope intercept form. y=mx+b
Where m is the slope and b is the y-intercept.

3x+y=15
Subtract 3x from both sides
y=-3x+15
Here slope, m=-3

Answer: Slope is -3. Option C is correct

Answer 2

slope intercept form is y = mx + b

so you must isolate the y first by moving the x (and anything attached to it) to the other side

3x (-3x) + y = (-3x) + 15

y = -3x + 15

The slope is m, which is next to x

-3x is what you are looking at

-3 is your slope

C. is your answer

hope this helps