Question

What is the slope of a line with the points (3.8, -4.7) and (6.2, 2.9)?

A. Zero

B. Positive

C. Undefined

D. Negative

Answer 1

\(\bf \begin{array}{lllll}
&x_1&y_1&x_2&y_2\\
&({\color{red}{ 3.8}}\quad ,&{\color{blue}{ -4.7}})\quad &({\color{red}{ 6.2}}\quad ,&{\color{blue}{ 2.9}})
\end{array}
\\\quad \\

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}}}\)

anything confusing there?

Answer 2

What am I supposed to do with that? Not trying to sound rude. What do I do first besides plug the numbers into my formula?

Answer 3

just plug in the values, yes, then simplify :)

Answer 4

\(\bf \begin{array}{lllll}
&x_1&y_1&x_2&y_2\\
&({\color{red}{ 3.8}}\quad ,&{\color{blue}{ -4.7}})\quad &({\color{red}{ 6.2}}\quad ,&{\color{blue}{ 2.9}})
\end{array}
\\\quad \\

slope = {\color{green}{ m}}= \cfrac{rise}{run} \implies \cfrac{{\color{blue}{ 2.9}}-{\color{blue}{ (-4.7)}}}{{\color{red}{ 6.2}}-{\color{red}{ 3.8}}}\)

Answer 5

So the answer should be positive, because the one negative number is outnumbered by 3

Answer 6

well... what does that give you?

Answer 7

B. If youre asking for the answer to the question. If youre asking about the simplifying part, 7.6/2.4 ----> 3.2 1/2.4 (ive never done this, and my teacher didnt teach us)

Answer 8

well... ok... you're only asked if it's positive or negative or else.. I guess you don't have to simplify, usually you would

but yes, is positive 7.6/2.4 which is about 3.17

Answer 9

Thank you :)

Answer 10

yw