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OpenStudy (anonymous):
Can someone please help me!
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OpenStudy (anonymous):
Really? No one? Please I have a midterm tomorrow!
jimthompson5910 (jim_thompson5910):
with what? please post the problem
OpenStudy (anonymous):
thank you! Determine the slope and the y-intercept of the graph of the equation.
12x - 7y - 84 = 0
OpenStudy (anonymous):
A) m =12/7 ; (0, -12)
B) m =7/12 ; (0, 7)
C) m = 12; (0, 84)
D) m = -12/7 ; (0, 12)
jimthompson5910 (jim_thompson5910):
Do you know how to solve for y?
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OpenStudy (anonymous):
no is ity= mx+b
jimthompson5910 (jim_thompson5910):
yes you want to get the equation into that form
OpenStudy (anonymous):
or 12x =84 im lost!
OpenStudy (anonymous):
or ()()
jimthompson5910 (jim_thompson5910):
Solve for y to get
12x - 7y - 84 = 0
12x - 7y = 84
-7y = -12x + 84
y = -12/(-7)x + 84/(-7)
y = 12/7x - 12
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jimthompson5910 (jim_thompson5910):
The equation is now in the form y = mx+b where m = 12/7 and b = -12
So the slope is 12/7 and the y-intercept as a point is (0, -12)
OpenStudy (anonymous):
thank you so much! I knew that! Just forgot!
OpenStudy (anonymous):
12x - 7y - 84 = 0
-7y = -12x + 84
y= 12/7 x + 84/(-7)
so m=12/7 and y-intercept= -12
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