In the $xy$-plane, what is the slope of the line with equation $3x + 7y = 9 ?$

In the $xy$-plane, what is the slope of the line with equation $3x + 7y = 9 ?$

(A) $-\dfrac73$
(B) $-\dfrac37$
(C) $\dfrac37$
(D) $3$
(E) $7$

Answer: B

Source: Official Guide

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swerve: Legendary Member; Posts: 2229; Joined: Sun Oct 29, 2017 2:04 pm; Followed by:6 members

Re: In the $xy$-plane, what is the slope of the line with equation $3x + 7y = 9 ?$

by swerve » Thu Sep 17, 2020 5:09 am

M7MBA wrote: ↑
Thu Sep 17, 2020 1:44 am
In the $xy$-plane, what is the slope of the line with equation $3x + 7y = 9 ?$

(A) $-\dfrac73$
(B) $-\dfrac37$
(C) $\dfrac37$
(D) $3$
(E) $7$

Answer: B

Source: Official Guide

For a general line equation $ax+by+c=0$

the slope is given by the quotient $-\dfrac{a}{b}$

So, in this case, it will be $-\dfrac{3}{7}$

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