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Mathematics 6 Online
OpenStudy (kmullis6):

Help me out?

OpenStudy (kmullis6):

OpenStudy (anonymous):

what is the y intercept?

OpenStudy (kmullis6):

the axis

OpenStudy (anonymous):

i.e where does the line cross the y axis?

OpenStudy (kmullis6):

4

OpenStudy (anonymous):

ok then it is going to be \[y=mx+4\] so you can ignore choice 3 and 4

OpenStudy (anonymous):

now you need the slope do you know how to see it from the graph?

OpenStudy (kmullis6):

no

OpenStudy (anonymous):

see where the line crosses the \(y\) axis at \((0,4)\) and it also crosses the \(x\) axis at \((3,0)\)

OpenStudy (anonymous):

that is 3 steps to the right (from \(x=0\) to \(x=3\)) and \(4\) steps down (from \(y=4\) to \(y=0\)) 3 right, down 4, slope is \(-\frac{4}{3}\)

OpenStudy (anonymous):

always the change in \(y\) up top, change in \(x\) in the denominator minus in this case because the line is going down as you read from left to right

OpenStudy (kmullis6):

ohhh ok i get it now. so y is always on top?

OpenStudy (anonymous):

yes, you are comparing the change in \(y\) to the change in \(x\) just like if you want the price per pound , it dollars over pounds \(\$2.50\) for \(4\) pounds of beans , price per pound is \(\frac{2.5}{4}\)

OpenStudy (kmullis6):

ok, thank you so much! :)

OpenStudy (anonymous):

yw

OpenStudy (kmullis6):

can you help me with another?

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