Graph the points and describe their location:
A (-3,4)
B (-5,0)
A: Quadrant 2
B: X-axis
Graph on slide 1
100
What is the x-intercept of a graph?
What is the y-intercept of a graph?
x-intercept: The x-coordinate of a point where the graph crosses the x-axis.
y-intercept: The y-coordinate of a point where the graph crosses the y-axis.
100
What is the formula for the slope of a line?
(y2-y1)/(x2-x1)
Rise/Run
100
What is slope-intercept form?
y=mx+b
100
Does the function y=4x represent direct variation? If so what is the constant of variation?
Yes, constant of variation (a) is 4.
200
Describe TWO different methods you could use to graph the equation 5x+3y=12
Possible answers:
(1) make a table, (2)use intercepts, (3) use slope and y-intercept
200
What are the x-intercept and y-intercept on slide 2?
x-intercept: -3
y-intercept: 6
200
Determine if the slopes are +, -, 0 or undefined in graphs A and B on slide 8.
A: negative
B: 0
200
Write the equation in slope-intercept form: 4x-y=3
y=4x-3
200
Does the equation x+2y=0 represent direct variation? If so identify the constant of variation.
Yes, the constant of variation (a) is (-1/2)
300
Graph the equation y+5x = 5 by making an x,y chart
Slide 11
300
Graph the line with the given intercepts:
x-intercept: 2
y-intercept: -5
Slide 3
300
Find the slope of the line that passes through the following points: (-2,0) and (4,9)
(3/2)
300
Identify the slope and y-intercept of the following equation:
3x+9y=9
Slope (m)=(-1/3)
y-intercept (b) = 1
300
Evaluate the function f(x)=2x-3 when x=7
f(7) = 2(7)-3 Simplify: f(7)=11
400
Graph the equation y=-4
slide 12
400
Find the intercepts of the equation: 2x-6y=18
x-intercept: 9
y-intercept: -3
400
Find the slope of the line that passes through the points
(-5,4) and (1,-8)
slope (m) = -2
400
Identify the y-intercept and slope of the equation then graph it.
-3x+4y=12