Big Ideas Math Integrated I, 2016
BI
Big Ideas Math Integrated I, 2016 View details
Chapter Test
Continue to next subchapter

Exercise 2 Page 211

Start by using the Slope Formula to find the slope.

y=-3x+6

Practice makes perfect
Lines written in slope-intercept form follow a certain format. y= mx+ b In this form, m is the slope and b is the y-intercept. Let's use the given points to calculate m and b. We will start by substituting the points into the Slope Formula.
m = y_2-y_1/x_2-x_1
m=-3- 6/3- 0
Simplify right-hand side
m=-9/3
m= -3
A slope of -3 means that for every 1 horizontal step in the positive direction, we take 3 vertical steps in the negative direction. Now that we know the slope, we can write a partial version of the equation. y= 3x+ b To complete the equation, we also need to determine the y-intercept, b. Since one of the given points is (0, 6), we already know that the y-intercept is 6. Now, we can complete the equation. y= -3x+ 6