Slope Formula
What is the slope formula?
y2-y1
--------
x2-x1
What is the point slope formula?
y-y1=m(x-x1)
Do vertical lines have zero or undefined slopes?
undefined slopes
What is the equation of a line?
y=mx+b
What makes two lines parallel
same slope
If slope goes up 2 and right 3, will it be positive or negative?
positive
Why do we use the point-slope formula?
If we are given a point and its slope in order to write it in y=mx+b form.
Do horizontal lines have zero or undefined slopes?
zero
Which letter in y=mx+b represents the y-intercept
b
What makes two lines perpendicular
negative reciprocal slopes
Slope of (5,3) & (9,9)
9-3 6
----- = ------ = 3/2
9-5 4
When given the point (-2,3) and the slope 3. Find the equation of the line in slope-intercept form.
y-3=3(x+2)
y-3=3x+2
y=3x-1
What kind of slope will the line y=2 have?
zero slope.
If the slope is 0/5, will the slope be zero or undefined?
zero
Are these two equations parallel, perpendicular, or neither?
y=3x+5
y=6-3x
neither
What is the slope between these two points?
(-5,4) & (2,-2)
-6/7
What is the point in this point-slope equation?
y-4=4(x+2)
(-2, 4)
If the line is x=3, what will the slope of the line be and where will it cross the x axis?
Slope is undefined, crossing at x=3
What is the slope?
2x+y=5
-2
Are these two lines parallel, perpendicular or neither?
y=1/2x+5
2y=x-8
parallel
What is the slope of 6y+3x=18?
-1/2
What is the point slope form of a line through (0,-2) & (3,4)?
y-4=2(x-3)
What kind of line is a horizontal line? y= or x=?
y=
What is the y-intercept?
4x+5y=-10
-2
Are these two lines parallel, perpendicular, or neither?
2y+5=3x-7
2x+4y=5x+10
neither