Intercepts
Explain what a y-intercept is.
Any of these:
- Point where a line crosses the y-axis
- Point where x = 0
- Beginning (or initial value) (or starting point)
The slope of a line that goes through (-1, 7) and (3, 9)
What is 2/4 or 1/2?
The slope is y = -5 - 2x
m = -2
Describe how to graph the line y = -3/4x + 14.
Start at 14 (on the y-axis), then move down 3, right 4 from there. [OR up 3, left 4 from the 14 on the y-axis]
Is (0,-1) the starting point on the line y=-2x-1? How do you know?
yes
-1 is b
and x is always 0
The slope of a line that passes through (0.5, -2) and (5.5, 1)
What is 3/5?
The slope and y-intercept of the line of the equation y = 50 - 3x?
What is m = -3 and b = 50?
A line starts at the point (0, 2) with the next point 3 units right and 5 units up from there. This is the equation of the line.
What is y=5/3x + 2?
The m and y-intercepts of y = 3x + 27
What is m = 3
and b = 27?
The slope of a line with the equation y = -6x - 8
What is -6?
The equation of a line (in slope-intercept form) that has m=6 and b=(0,4)
What is y = 6x + 4?
How to graph the equation y = 1/3x -5
Put a point on (0,-5) then move up 1 and right 3 units from there.
The m and y-intercepts of y = -2x + 6
What is m = -2
and b = 6?
The slope of a line of the equation y =-4/3x + 8
What is -4/3?
The slope of a line that passes through (-3, -2) and (-6, -5)
m = 1
Write the equation of the line in slope-intercept form.
y = -2 + 7x
y=7x-2
The m and y-intercepts of y -4/5 x - 8
What is m = -4/5
and b = -8?
The slope of a line that passes through (5, 4) and (5, -8)
What is undefined or 12/0
The Starting point of a line
y = x
b = 0
Write an equation of a line that passes through (5,6) and (0,11).
y=-x+11