intro 300 In this lesson we will study slope-intercept form. reminder 300 Recall the slope formula from the last lesson: m = (y-y)/(x-x) attention rectangle Very important! y must be alone on one side of the = sign reminder 300 The coefficient of x is the slope. reminder The constant is the y-intercept. 440 270 300 attention rectangle To invert means to turn something upside down. reminder In slope-intercept form, the y-intercept is the ordered pair (0,b). comment 5 200 200 15 Notice how it's all addition? Which ordered pairs will make y = 2x + 3 true? (5,1) (3,9) neither (3,9) How many solutions does a linear equation have? 3 10 50 ∞ ∞ prompt 460 10 Take notes in your study guide. attention rectangle Watch the signs of m and b! What is the slope of the line y = 5x + 6 ? 5 What is the y-intercept of the line y = 3x - 4? -4 reminder Remember…solve for y means get y alone on one side of the = sign. Now try this one. Is {(0,2), (4,5), (0,3)} a function? yes no no prompt 18 320 720 100 25 Pause the video and work this one on your study guide. important 15 300 450 40 Review your study guide for a great tip!