Question 1 and 2?

4.1 Exercises Dynamic Solutions available at BigideasMath.com Vocabulary and Core Concept Check 1. COMPLETE THE SENTENCE A linear function that models a real-life situation is called a 2. WRITING Explain how you can use slope-intercept form to write an equation of a line given its slope and y-intercept. Monitoring Progress and Modeling with Mathematics In Exercises 3-8, write an equation of the line with the In Exercises 19-24, write a linear function f with the given slope and y-intercept. (See Example 1.) given values. (See Example 4.) 3. slope: 2 4. slope: 0 19. f(0) = 2, f(2) = 4 20. f(0) = 7, f(3) = 1 y-intercept: 9 y-intercept: 5 21. f ( 4) = - 3, f(0) = -2 5. slope: - 3 6. slope: -7 y-intercept: 0 y-intercept: 1 22. f ( 5 ) = - 1, f(0) = -5 7. slope: 5 8. slope: - 23. f(-2) = 6, f(0) = -4 y-intercept: - 8 y-intercept: -6 24. f(0) = 3, f(-6) =3 In Exercises 9-12, write an equation of the line in slope-intercept form. (See Example 2.) In Exercises 25 and 26, write a linear function f wit 9. 10. given values. Ay Ay 25. x f(x) 26. X f(x) 4 *(0 , 3 ) (3 , 3 ) (4, 2) (0, 2) 2 2 4 x 2 4 x 27. ERROR ANALYSIS Describe and correct the err writing an equation of the line with a slope of 2 y-intercept of 7