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Mathematics 8 Online
OpenStudy (anonymous):

Look at the graph, write it's equation. (picture 1 is graph) (picture 2 is possible answers)

OpenStudy (anonymous):

OpenStudy (anonymous):

one of these are the equations :

OpenStudy (campbell_st):

you need to find the slope between the points (-4, -7) and (0, 6) the y intercept is -6 so the equation will be y = mx - 6 just find the slope m

OpenStudy (anonymous):

so do we plugin any x coordinate to the x in the equation?

OpenStudy (campbell_st):

do you know how to find the slope of a line... ?

OpenStudy (anonymous):

you have two set of points (0, -6) and (-4,-7) just find the slope if you have two points (x1,y1) ,( x2,y2) slope is \[\Large m=\frac{y_{2}-y_{1}}{x_{2}-x_{1}}\]

OpenStudy (anonymous):

would it be -1/-4?

OpenStudy (anonymous):

so it would be y=-1/4x-6

OpenStudy (anonymous):

or no.

OpenStudy (campbell_st):

what happens with the -1/-4 it can be simplified... to

OpenStudy (campbell_st):

it uses the rule of multiplying 2 negatives

OpenStudy (anonymous):

it turns into a positive?

OpenStudy (campbell_st):

correct... and looking that the graph of the line... it has a positive slope... so you need 1/4 as the slope.

OpenStudy (campbell_st):

hope you have an answer with y = 1/4 x - 6

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