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Linear Function Retest Project

Published on Nov 19, 2015

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MORE DECKS TO EXPLORE

PRESENTATION OUTLINE

1.

VERTICAL AND HORIZONTAL LINES

  • Vertical lines go up and down and cross the x axis
  • Horozontal lines go side to side and cross the y axis
  • Slope is also called rise over run
  • Slope shows the steepness of a line
  • Equations for lines are in the form of y=mx+b
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2.

WRITTING EQUATIONS OF INFORMATION GIVEN

  • You have to pick out the information you need first, including the rise over run points and y intercept
  • Then form a graph based on the information with the points
  • The slope of a graph is the change of y over the change of x
  • The y intercept sits of the y axis so the point would be 0 then the number. (Ex: (0,-3)
  • Counting up and over from one point on the graph to the next point is a way to calculate slope
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3.

STANDARD FORM

  • Standard form is y=mx+b
  • For example: y=2/3x+ 6/3
  • So when simplifying and graphing this equation you have to solve and simplify the fraction.
  • 6/3 simplifies down to 2
  • Then 2 would be your y intercept point, and 2/3 is your slope.
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4.

PARALLEL AND PERPEDICULAR LINES

  • Parallel lines are 2 or more lines that can go on forever and never touch
  • This means that parallel lines must have the same slope
  • Perpendicular lines are two lines that cross each other at 90 degree angles
  • This means perpendicular lines have the inverse slope as each other
  • Parallel = Same slope but different y intercept .. Perpendicular = inverse slope! same intercept
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5.

INVERSE OF AN EQUATION

  • Inverse of an equation means you switch where the y and the x is
  • For example Y=1/2x + 5
  • So that equation ^^would be x= 1/2y -5
  • You also then switch the sign of the intercept
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6.

SCATTER PLOT

  • Making a scatter plot graphs usually look like graph paper with chicken pox
  • You usually have an equation then you plug and chug in the x to get the y
  • You then plot the dots onto the graph, and it will have a correlation
  • Correlations can be either positive, negative or no correlation
Photo by JcMaco

Brandi Moore