Day 42 – October 19

Algebra: Chapter 7, Lesson 3, page 313.

Linear Equations and their Graphs

Linear equation have to have variables with a power of 1, NO mixed variable products and NO variables in an equation in the denominator. The easiest way to plot or graph an equation is to use the x-intercept and y-intercept.

  • The x-intercept of a line is the x-coordinate of the point where the line intercepts the x-axis. To do this, all we have to do is set `y=0` and solve for `x`.
  • The y-intercept of a line is the y-coordinate of the point where the line intercepts the y-axis. To do this, set `x=0` and solve for `y`

The standard form of a linear equation in 2 variables is `Ax + By = C`, where A, B and C are constants.

For horizontal lines, the graph of `y = b` is the x-axis or a line parallel to the x-axis with y-intercept, `b`.

For vertical lines. the graph of `x = a` is the y-axis or a line parallel to the y-axis with x-intercept, `a`.

Two of tonight’s homework problems solved by MrE are here! Just click it.

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Algebra 1a: Chapter 2 Review

Skills Practice 5 and 6 sheets, pages 13 and 14, make sure you got it all down!

  • Distribute (push all the way through!)
  • Factor
  • Combine Like Terms
  • Add/Subtract/Multiply/Divide with ± numbers
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