Bellringer

Chapter 6: Section 2 Slope-Intercept Form

Linear Equation Any equation whose graph is a line Since a function rule can form a line, a function can be linear f(x) = 2x + 5

Y-Intercept Represented by the variable b The y-coordinate of the point where the line crosses the y-axis Graph y = 2x + 5 to see where is crosses the y-axis. What is its slope?

Slope-Intercept Form y = mx + b m = slope b = y-intercept

Find the slope and y-intercept y = 3x – 5 y = x + 1 y = (2/3)x – 3 y = -2x

Write an equation of the line from the given slope and y-intercept. m = 2/9 b = 3 m = 0 b = 1 m = -1/4 b = -2 m = 3 b = 0

Write the slope-intercept form from the graph of the equation

Use the slope and the y-intercept to graph the equation y = ½ x +4 y = 2x +5 y = -3/2 x

Assignment Page 294 Numbers 3-39 multiples of 3 Number 40