Slope Intercept Form #1
What is slope intercept form?
y=mx+b
If the slope of a line is going down, what kind of slope do you have?
Negative slope
What is a scatter plot?
A graph of plotted points that show the relationship between two variables.
Write an equation of the line that passes through (2, −3) with a slope of 4
y=4x−11
What is the formula when you are given two points and need to solve for slope?
What are two things we need to make a line?
1. Slope
2. Y- intercept
If the slope of a line is going up, what kind of slope do you have?
Positive slope
What is line of best fit?
A line through a scatter plot of data points that best expresses the relationship between those points and can be used to predict other values in the data.
Write an equation of the line that passes through (−5, 1) with a slope of −2.
y=−2x−9
Yes,
2/3
What is the slope and y-intercept of
2/3x +5
slope : 2/3
y -int : 5
If you have a line with a slope of 0 what kind of line is it?
Horizontal Line
What is Expected Value?
A predicted value in the data set using the equation of the line of best fit
Write an equation of the line that passes through (6, 4) with a slope of 0
y= 4
M=Slope
At the origin
(0,0)
If you have a line with a slope of UNDEFINED what kind of line is it?
Vertical line
What is the actual value?
Values collected in the actual data.
Write an equation of the line that passes through (−3, 5) with a slope of 1/2
y=1/2x+ 13/2
True or false
(0,2) 2= Y intercept
False
2 is the Y coordinate
Fill in the blank, when y equals _____________, it's always a _________________ line.
a number
horizontal line
A gym charges a $15 sign-up fee and $8 per month for a membership. The total cost depends on the number of months you are a member.
y=8x+15
What are the three Correlations of data?
1. positive
2. negative
3. none
Beck has to write the equation of the line that passes through (3,-5) with a slope of -3 but her teacher told her she made a mistake.
-5=-3(3)+b
-5=9+b
-14=b
y=-3x-14
When he multiplied -3(3) = -9 not 9
-5+9=4 so b equals 4
y=-3x+4
When is your skills check?
FRIDAY