Write the equation of a line that has a slope of 3 and a y - intercept of -2.
a)y= -2x+3
b)y=3x+2
c)y=3x-2
d)y=2x-3
2007-08-04 11:38:37 · 4 answers · asked by Billy_Bob 1 in Science & Mathematics ➔ Mathematics
Slope of 3 means m is 3 in equation y = mx+b.
Yint of -2 means b = -2 (set x = 0)
=> y = 3x-2.
2007-08-04 11:44:40 · answer #1 · answered by Anonymous · 0⤊ 0⤋
Remember the general form of a line equation is:
y=mx+b
m is the slope (usually a number in front of the letter x, if x is by itself then this number is 1).
b is the y intercept
x is the independent variable (fancy math for can be anything)
y is the dependant variable (again fancy math talk for it depends on what x is)
y intercept ( math talk for x=0) which makes y=b when x = 0
translating the question into plain English becomes
which answer has a 3 in front of x and if x=0 and disappeared would leave y = -2?
it is obvious that only answer C fits the description.
2007-08-04 18:57:18 · answer #2 · answered by 037 G 6 · 0⤊ 0⤋
C because all these equations are in slope-intercept form of y=mx+b where m is the slope and b is the y-intercept. C meets both criteria.
2007-08-04 18:43:07 · answer #3 · answered by reversedacurse90 3 · 0⤊ 0⤋
refer to the equation of a line,
y=mx+b
this is where m is the slope and b is the y-intercept
so all you have to do is plug in the values that your question stem gave into the above equation....
y=mx+b with ur values given equals y=3x-2
2007-08-04 18:50:09 · answer #4 · answered by mandeep s 1 · 0⤊ 0⤋