Warm - Up: Find the slope of each line

1)

2) (-8,14) and (-12,-8) 3) (-18,12) and (-18,-16)

Slope-Intercept Form (of a Linear Function) You will be able to: - Write the equation of a line in slopeintercept form

Linear Function: Function whose graph is a straight line or part of a straight line

Y-intercept (b): Point where the line crosses the y-axis

( , )

( , )

b=

b=

Slope-Intercept Form (of a linear equation):

y = mx +b Slope y-intercept

g(x) = mx +b

Identify the Slope and Y-intercept:

y = -x - 2 Slope (m) = y-intercept (b) =

White Boards ... Identify the Slope and Y-intercept

1) y = -2x + 1 2) y = 1x - 5 5 3) y = x

Write the Slope-Intercept Form of the Equation of the Line:

Slope = -3 y-intercept = 0

y=mx+b

White Boards ... Write the Slope-Intercept Form of the Equation of Each Line 1) Slope: 5 Y-intercept: -1

2 2) Slope: 1 Y-intercept: 0

y=mx+b

Write the Slope-Intercept Form of the Equation of the Line: 1) Slope (m):

2) y-intercept (b):

3) y = mx + b

White Boards ... Write the Slope-Intercept Form of the Equation of the Line

y = mx + b

White Boards ... Write the Slope-Intercept Form of the Equation of the Line

f(x) = mx + b

White Boards ... Write the Slope-Intercept Form of the Equation of the Line

y = mx + b

Write the Slope-Intercept Form of the Equation of the Line 2 Through (3, -1); Slope = 3 1) Plug the point and the slope into the equation y = mx + b and SOLVE for the y-intercept (b)

b=

2) Write your final answer as y = mx + b

White Boards ... Write the Slope-Intercept Form of the Equation of Each Line 1) Through (1,2); slope = 7 2) Through (2,-1); Slope = -1 2 3) Through (-2,5); Slope = -4 4) Through (-4,3); Slope = 1

Write the Slope-Intercept Form of the Equation of the Line Through (-4,1) and (-2,2) 1) Find the slope (m) (Use the slope formula) 2) Plug ANY point and the slope into the equation y = mx + b and SOLVE for the y-intercept (b)

3) Write your final answer as y = mx + b

White Boards ... Write the Slope-Intercept Form of the Equation of Each Line 1) Through (0,3) and (2,5) 2) Through (-3,1) and (0,4) 3) Through (-4,4) and (0,-2) 4) Through (4,-3) and (-1,-1)

KAHOOT

HOMEWORK: WORKSHEET