BELLWORK 1 Kristin spent 131 on shirts Fancy

BELL-WORK 1. Kristin spent $131 on shirts. Fancy shirts cost $28 and plain shirts cost $15. If she bought a total of 7 then how many of each kind did she buy? 28 x + 15 y = 131 x+y=7 y = -28 x + 131 15 15 y = -x + 7 -28 x + 131 = -x + 7 15 15 x = 2, y = 5

BELL-WORK 2. Which equation represents a linear function? A. y = x(2 − 3 x) B. y = ½(x − 3) − 2 x C. y = ½x 2 + 3 x − 1 D. y = ½x(2 x − 1) + 3 B

Functions Identify the domain and range of the following relationship: {(-4, 3), (2, 1), (0, 3), (-3, -2)} D= {-4, -3, 0, 2} **Always list the members in numerical order, with no repeats! R= {-2, 1, 3}

Functions Is the following relationship a function? {(-4, 3), (2, 1), (0, 3), (-3, -2)} Since each member of the domain is only paired with one member of the range, then it is a function. Are the following relationships functions? (a) {(1, 3), (-2, 8), (3, 4), (-2, 2)} Since each member of the domain is not paired with only one member of the range, then it is not a function. (b) {(3, 8), (-1, 8), (4, 8), (-2, 8)} Since each member of the domain is only paired with one member of the range, then it is a function. (a) {(3, 1), (8, -1), (7, -4), (5, 9)} Since each member of the domain is only paired with one member of the range, then it is a function. **Look for repeats in the domain. Multiple arrows from one domain entry disqualifies the relation from being a function.

Functions Eureka Module 5 Lesson 2 Exercise 2

Functions Eureka Module 5 Lesson 2 Exercise 3

Functions Eureka Module 5 Lesson 2 Exercise 4

Functions John examined the table of values shown below and stated that a possible rule to describe this function could be y = x 2 + 4. Is he correct? Input(x) -3 -2 Output (y) 13 8 Yes! -1 5 0 4 1 5 2 8 3 4 13 20