This week we further continued unit 7/8 by learning about point-slope form and general form. Both of which are put into a different form than slope formula. Point slope form is useful for doing quick algebra, and general form has no fractions and other “imperfections”.
Point-slope form looks like the following:
is the slope. is not connected to a point, but is. The same goes for and . You can take an equation or “hints” to make a point-slope formula.
To further turn this into slope formula and make it easier to understand, you use algebra and steps.
continuing with ex.
General form is the “pretty useless” form, pretty, but useless. It contains no fractions or decimals, but doesn’t tell you about the graph itself. The equation usually looks something like ax ± ny ± b = 0. the x is always first, y is always second, x is always positive, and everything is always on one side equalling zero.
You can change all forms/formulas into general form.
- slope formula.
- Point-slope form.
- slope formula with fractions.
General form uses no fractions and follows several rules as listed in the paragraph above. It is used to take away fractions and “imperfect” parts of a formula, but it doesn’t tell you anything until it is changed into another form.