Question

Determine which pair of points has a negative slope.


a) (–9, –2), (3, 6)

b) (2, –8), (–1, –9)

c ) (–8, 1), (8, –8)

d) (6, 9), (5, 7)

Answer 1

why not just find each slope firstly? :)

Answer 2

@OppsKBeetleJuice
Recall that:
\[m=\frac{ y_{2}-y_{1} }{ x_{2}-x_{1} }\]

Answer 3

I Forgot How To Do It @sunnnystrong

Answer 4

\(\bf \begin{array}{lllll}
&x_1&y_1&x_2&y_2\\
% (a,b)
&({\color{red}{ -9}}\quad ,&{\color{blue}{ -2}})\quad
% (c,d)
&({\color{red}{ 3}}\quad ,&{\color{blue}{ 6}})\\
&({\color{red}{ 2}}\quad ,&{\color{blue}{ -8}})\quad
% (c,d)
&({\color{red}{ -1}}\quad ,&{\color{blue}{ -9}})\\
&({\color{red}{ -8}}\quad ,&{\color{blue}{ 1}})\quad
% (c,d)
&({\color{red}{ 8}}\quad ,&{\color{blue}{ -8}})\\
&({\color{red}{ 6}}\quad ,&{\color{blue}{ 9}})\quad
% (c,d)
&({\color{red}{ 5}}\quad ,&{\color{blue}{ 7}})\\
\end{array}
\\\quad \\
% slope = m
slope = {\color{green}{ m}}= \cfrac{rise}{run} \implies
\cfrac{{\color{blue}{ y_2}}-{\color{blue}{ y_1}}}{{\color{red}{ x_2}}-{\color{red}{ x_1}}}\)


see what slope each one has then

Answer 5

@OppsKBeetleJuice yep what @jdoe0001 said :D

Just plug in values into the equuation**

Answer 6

Thanks You Guys

Answer 7

NP Anytime :D