McGraw Hill Glencoe Algebra 1 Texas, 2016
MH
McGraw Hill Glencoe Algebra 1 Texas, 2016 View details
3. Writing Equations in Point-Slope Form
Continue to next subchapter

Exercise 1 Page 235

Everything necessary to use point-slope form has been given in the problem.

Equation: y-5=- 6(x+2)
Graph:

Practice makes perfect

Using the given point and slope, we can apply the point-slope form to write and graph the equation. We will start by writing the equation.

Writing the Equation

An equation in point-slope form follows a specific format. y- y_1= m(x- x_1) In this format, the variable m represents the slope of the line and the point ( x_1, y_1) lies on the graph of the line. We are given the point ( -2, 5) and the slope -6, so we have everything we need to create a point-slope form equation. Let's substitute these values into the general form and simplify.
y-y_1=m(x-x_1)
y- 5= - 6(x-( - 2))
y-5=- 6(x+2)

Graphing the Equation

To graph the line, we will plot the given point (-2,5) and use the slope -6 to find a second point. A slope of -6 means that we will move one step to the right and six steps down. By connecting the given point and our new point with a line, we get the graph of the equation.