7.1 pg. 459

#17. 2y-2x=2
2y-2x=6

rewrite in y slope intercept form.
y=x+1
y=2/2x is +1

ex. 4 graphing a line using y-intercept form and slope
graph the line 2x-3y=3
subtract 2x from each side.
-3y=-2x+3
2x-2x=0-3y=3-2x
-3y=2x+3 then divide both sides by -3
y=2/3x-1
the subtraction of 2-3=1 bring the x.
the slope is 2/3 and the y- intercept is (0,-1)

ex. 5 pg. 204
graphing lines with y intercept and slope.
a) y=-3x+4
solution:
first write the equation in slope intercept form:
the slope is -3 and the y intercept is (0,4), Because, -3=-3/1

b) 2y-5x=0
first solve the equation for y.
2y=5x
y=5/2x
the slope is 5/2 and the y intercept is 0,0.

the method of graphing depends on the form
slope intercept form y=mx+b Standard form is Ax+By=c

y=mx+b start at the y intercept of 0,b and count off the rise and run.
Ax+By=c find the x intercept by setting y=o and find the y intercept by x=0, and one additional point as check.

that is all for now
Marie Zajac BA in Psychology with a concentration in Rehabilitation in Counseling.