2007-11-15 18:46:29 · 3 answers · asked by Sandy J 1 in Science & Mathematics ➔ Mathematics
y - 2 = 3(x - 1)
y = 3x - 3 + 2
y = 3x - 1
2007-11-15 19:43:58 · answer #1 · answered by Como 7 · 2⤊ 1⤋
y = mx + b is the slope intercept form of an equation where m is the slope (the change in y / the change in x) and b is the y-intercept or the place the graph of the line crosses the y axis, the point where x - 0 or (0,b)
m = 3
y = mx + b
y = 3x + b
SUBSTITUTE the point (1,2) into this equation and solve for b
y = 3x + b
2 = 3(1) + b
2 = 3 + b SUBTRACT 3 from both sides
-1 = b
SUBSTITUTE the value of b into y = 3x + b for the equation
y = 3x + b
y = 3x - 1 ANSWER
Check by SUBSTITUTING the point (1, 2) into the equation
y = 3x - 1
2 = 3(1) -1
2 = 3 - 1
2 = 2 it checks out
2007-11-15 19:27:39 · answer #2 · answered by Anonymous · 0⤊ 1⤋
umm.. Hello!! please specify the question...
do you need to know the equation in slope intercept form?? well here it is:
y - 2 = 3 (x - 1)
3x - y + 1
2007-11-15 19:19:25 · answer #3 · answered by windzard 2 · 0⤊ 1⤋