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Assoli18 [71]
3 years ago
15

A line passes through the points (4,-4) and (8,12). What is the y-intercept of the line ?

Mathematics
1 answer:
fredd [130]3 years ago
3 0
\frac{y2-y1}{x2-x1}= \frac{y-y1}{x-x1} = \frac{12-(-4)}{8-4}= \frac{y-(-4)}{x-4}
\frac{16}{4}= \frac{y-(-4)}{x-4 }  
= 4(x-4)=(y+4)
4x-16=y+4

4x=y+4+16
4x=y+20
y=4x-20


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For the tabular column mark Hours on the x - axis and Dollars on the Y - axis. It can be plotted from the above table easily.

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