Unit 1

• In Standard Form, the equation of a linear line is $ax+$$by+$$c=$$0$

  • Slope/gradient is $-a/b$
  • Y-intercept is $-c/b$
  • X-intercept (bonus!) is $-c/a$
• The Slope-Intercept Form equation is $y=$$mx+$$c$
• The Point-Slope Form equation of the line is $(y-y_1)/(x-x_1)=$$m$ .

  x $x$ and $y$ don't get substituted, only the ones with the subscript. After that, you should move the $x$variables and expand them with the gradient. From here, you can move to both Standard Form and the Slope-Intercept Form, depending on what's best.