3. Writing Equations of Parallel and Perpendicular Lines
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What do parallel lines have in common?
y=3/2x-8
When lines are parallel, they have the same slope. To help us identify the slope of this line, let's first convert it into slope-intercept form, y= mx+ b, where m is the slope and (0, b) is the y-intercept.
.LHS /2.=.RHS /2.
Write as a sum of fractions
Calculate quotient
With this, we can more easily identify the slope m and y-intercept b.
Now that we have the y-intercept, we can write the equation of the line that is parallel to y= 32x+5 and passes through (2,-5). y= 3/2x+( -8) ⇒ y=3/2x-8