---

COLLEGE ALGEBRA: AN INVESTIGATIVE APPROACH

by

S. Kastberg & T. Barron

ALGEBRAIC FORMS OF LINEAR FUNCTIONS

INVESTIGATION 1: Finding a line in point slope form given a line in slope intercept form

Exercise 1

Given the function y = 3x + 5 can you find an equation the line in the form y - y1 = m(x - x1).

Exercise 2

Given the function y =-2x - 1 can you findan equation the line in the form y - y1 = m(x - x1).

Exercise 3

Given the function y = x - 3 can you find an equation the line in the form y - y1 = m(x - x1).

Generalization

Can you generalize from your activities above?

Given the function y = mx + b can you find an equation for the line in the form y - y1 = m(x - x1).

Return