Question

B) The slope of a line is 3. The line contains the points (-1,8), and (x, 2).Then x =

Answer 1

The slope between two points (x1,y1) and (x2,y2) is given by:

`m=(y_2-y_1)/(x_2-x_1)`

Plugging the values of the points given and the slope we have that:

`\begin{gathered} (2-8)/(x-(-1))=3 \\ (-6)/(x+1)=3 \\ 3(x+1)=-6 \\ x+1=-(6)/(3) \\ x+1=-2 \\ x=-2-1 \\ x=-3 \end{gathered}`

Therefore x=-3