Question

What is the equation of the line in slope-intercept form? the line perpendicular to y =1/3x+5 through (2, 1)

A. y = 1/3x + 7

B. y = -3x + 7

C. y = 3x + 7

D. y = -1/3x + 7

Answer 1

Two lines are perpendicular when the product of their slopes equals -1
so slope1*slope2=-1
y=ax+b, a=slope and b=y-intercept
In your problem you have slope1=1/3 so slope2=-1/(1/3)=-3
the equation of the line when you're given the slpoe and a point is
y-yo=slope(x-x0) where (x0;y0) are the coordinates of the point given
so
y-1=-3(x-2)
y-1=-3x+6
y=-3x+7

Answer 2

ok

Answer 3

B

Answer 4

So u guys are saying the answer is B

Answer 5

yes B

Answer 6

Thank you so much u guys