McGraw Hill Glencoe Algebra 2, 2012
MH
McGraw Hill Glencoe Algebra 2, 2012 View details
Mid-Chapter Quiz
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Exercise 21 Page 91

You are given everything you need to use point-slope form.

y=-2.5x+4.5

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.
An equation in point-slope form follows a specific format. y- y_1= m(x- x_1) In this format, m represents the slope and the point ( x_1, y_1) lies on the graph of the line. We are given the point ( 1, 2) and the slope - 2.5, so we have everything we need to create a point-slope form equation.

y-y_1=m(x-x_1)
y- 2= - 2.5(x- 1)
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Simplify
y-2=- 2.5 x-2.5(- 1)
y-2=- 2.5x+2.5* 1
y-2=- 2.5x+2.5
y=- 2.5x+4.5