What is the y-intercept of a graph with the points (-1, -2) and (4, 6)?

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Answer 1 · 2016-04-30T23:38:01

$y$ $y$ -intercept $= - \frac{2}{5}$ $= -2/5$

The run of $x$ $x$ is $5$ $5$ and the rise of $y$ $y$ is $8$ $8$

The slope is

$slope = \frac{rise}{run} = \frac{8}{5}$ $"slope" = "rise"/"run" = 8/5$

You have

$y = \frac{8}{5} x$ $y =8/5x$

Then if you put $(4, 6)$ $(4,6)$ at the equation above,

$6 = \frac{32}{5}$ $6= 32/5$

To make the equation true, you should subtract $\frac{2}{5}$ $2/5$

$y = \frac{8}{5} x - \frac{2}{5}$ $y=8/5x-2/5$