SOLUTION: My niece is in 8th grade and is having trouble with Slope intercept form, Point intercept form and Standard form. I told her I would help her but in order to do that I must learn w

Algebra ->  Linear-equations -> SOLUTION: My niece is in 8th grade and is having trouble with Slope intercept form, Point intercept form and Standard form. I told her I would help her but in order to do that I must learn w      Log On


   

Question 373807: My niece is in 8th grade and is having trouble with Slope intercept form, Point intercept form and Standard form. I told her I would help her but in order to do that I must learn what these are. Can you help Me?
Answer by nerdybill(7384) About Me  (Show Source):
You can put this solution on YOUR website!
www.purplemath.com is a good place to start.
All three are used to describe a straight line.
.
Slope-intercept form:
http://www.purplemath.com/modules/strtlneq.htm
y = mx + b
where
m is the slope
b is the y-intercept (point at which it crosses the y-axis)
.
Point-slope form:
http://www.purplemath.com/modules/strtlneq2.htm
y - y1 = m(x - x1)
is basically used when you are given one point (x1, y1) and a slope and you want to determine the equation of the line.
.
Standard form is in the form: (not used too often)
Ax + By = C