y=2x+4
y=3x+4
Which of these statements is true, given the equations of lines above in slope-intercept form?
a. The two lines are parallel.
b. The two lines intersect.
c. The two lines are perpendicular.
d. Both b & c are true.
2007-06-11 07:28:33 · 3 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
I'm going to say B.
It's not parallel because for two lines to be parallel they have to have the same slope. well the slope for the first line would be 2. the slope for the second line would be 3.
They're not perpindicular because for two lines to be perpindicular they have top be recipricols. (3 and -1/3 for example)
It's B because they have the same y intercept, which means they intersect.
2007-06-11 07:34:52 · answer #1 · answered by becca h ♥ 2 · 0⤊ 0⤋
The slope of one line is 2 and the slope of the other is 3.
The two lines are not parallel, because they have different slopes.
Therefore, because they are coplanar, they must intersect.
They are not perpendicular, because perpendicular lines have negative inverse slopes, like 3 and -1/3 or 2 and -1/2
2007-06-11 14:34:03 · answer #2 · answered by TychaBrahe 7 · 1⤊ 0⤋
Slope is the coefficient of the X variable.
Since they aren't the same, the lines will instersect, which means they aren't parallel. Perpendicular lines have opposite riciprocal slope ( 5 & -1/5), since they aren't that, they aren't perpendicular.
So only B is correct.
2007-06-11 14:33:40 · answer #3 · answered by mr_moose_man 3 · 1⤊ 0⤋