alma79
28.10.2019 •
Mathematics
For the y intercept form or standard form, you need the slope of the line and the y intercept.
standard form: y = mx + b
we already found the slope, m= -1
now we just need the y intercept (b).
to find b you can plug in the slope and one point into the equation and solve for b.
i'm using the point (-5,9)
y= mx+ b
9 = (-) + b
9 = 5 + b
4 = b
now that we have the slope, m, and the y intercept, b, we use those to form the equation of the line.
y = mx+ b
y = -1x + 4
y = -x + 4
if you take the point slope forms that we found above and solve for y they will match the standard form equation.
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