JeffTargetTestPrep wrote:
surupab wrote:
Does the line with equation ax+by = c, where a,b and c are real constants, cross the x-axis?
(1) b not equal to 0
(2) ab>0
(1) b not equal to 0
(2) ab>0
We are given a line with equation ax+by = c, where a,b and c are real constants, and we need to determine whether it crosses the x-axis. Let’s start by isolating y in our given equation:
ax+by = c
by = -ax + c
y = (-a/b)x + (c/b)
We now have the given equation in slope-intercept form; the slope is -a/b and the y-intercept is c/b.
Statement One
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