Download Lesson 13.7 – Writing Equations in Point

Lesson 13.7 – Writing
Equations in Point-Slope
Form
8.F.4 – Construct a function to model a linear relationship
between two quantities. Determine the rate of change and
initial value of the function from a description of a
relationship or from two (x, y) values, including reading these
from a a table or from a graph. Interpret the rate of change
and initial value of a linear function in terms of the situation it
models, and in terms of its graph or a table of values.
Today you will learn…
to write an equation of a line given a
slope and a point or two points.
Key Vocabulary
point-slope form
Key Idea
A linear equation written in the form y – y1 =
m(x – x1) is in point-slope form. The line
passes through the point (x1, y1), and the
slope of the line is m.
Warm-Up
Warm-Up
Use the point-slope form to write an equation of the line with
the given slope that passes through the given point.
On Your Own
On Your Own
Mini-Assessment
Exit Ticket:
Write an equation of the line with a slope of
2 that passes through the point (-1, 4) in
point-slope form and slope-intercept form.
y – 4 = 2(x + 1); y = 2x + 6
Homework
pp. 612 – 613
1 – 5, 6 – 18 even, 19 – 27