Slope/Intercepts
What does the m and the b represent in y = mx + b?
m - slope b - y-intercept
Write out the slope-intercept form?
y = mx + b
What Quadrant is (-3, 4) in?
Quadrant 2
Solve using substitution
5x + 3y = 17
x - 2y = 6
(4, -1)
What is the name of the famous mathematician who developed the Cartesian Coordinate System? Extra points for correct spelling.
Rene' Descartes
What are the x and y intercepts for x - 4y = 12
x (12, 0) y (0, -3)
Transform the equation to slope-intercept form.
3x + 5y = 10
y = -3/5x + 2
What Quadrant is (-9, -12) in?
Quadrant 3
Solve using substitution
3x + y = 13
2x - 4y = 18
(5, -2)
What is the St. A mascot?
Gryphon
What do you find when you use the rise/run from one point to another on a line?
slope
Transform the equation to slope-intercept form.
y - 5 = 3/7(x - 7)
y = 2/5x - 3
Give an example of an ordered pair that would be in Quadrant 4)
(+x, -y)
Solve using the combination method.
4x + 9y = 75
4x + 3y = 33
(3, 7)
Write out point-slope form?
y - y1 = m(x - x1)
Use the graph for #36 on your handout to find the slope of the line.
3/4
A line has a slope of -3 and a y-intercept of 9. Write an equation in slope-intercept form.
y = -3x + 9
Write an equation using the graph that goes with #32 on your handout. Use slope-intercept form.
y = 7/3x - 2
Solve using the combination method.
2x - 3y = -8
11x + 5y = -1
(-1, 2)
Draw a Coordinate grid and label the quadrants.
1, 2, 3, 4
What kind of line has a zero slope? What would the equation of this graph look like?
horizontal y = 6
Determine whether 2x - 3y = -8 has a positive slope or a negative slope.
positive (-3/2)
Write an equation using the graph that goes with #34 on your handout. Use point-slope form.
y - 1 = -1/2(x - 3)
Final jeopardy - open your books to p. 328. Complete #13 together
431 reserved 1356 general admission
What is another name for the x coordinate and the y coordinate?
abscissa and ordinate