ALGEBRA I @ LINEAR REVIEW (and other stuff too)

Graph. 1) 2) 3x – 9y = 18

Graph. 3) 4) y = -2

ALGEBRA I - LINEAR REVIEW 12/30/2018 Graph. 5) y < -3x + 4

6) While on a business trip to Seattle, Kody rents a car for a flat fee of $45 and $33 per day. Write an equation expressing the amount Kody owes, y, in terms of the days, x, renting the car. ANSWER : y = 33x + 45

Given the mapping at the right. a) Write the ordered pairs the mapping represents. ANSWER : {(-2, 3), (0, 1), (2, 3), (4, 5)} b) Write the domain. d) Does the mapping represent a function? Explain. ANSWER : {-2, 0, 2, 4} c) Write the range. Yes. No member of the domain repeats. ANSWER : {1, 3, 5}

A line passes through the points (-2, 5) and 8) Given f(x) = x2 + x, find… a) f(8) ANSWER : 72 b) f(-5) ANSWER : 20 A line passes through the points (-2, 5) and (3, -10). Write the equation of the line in the following forms. a) Point-Slope ANSWER : y – 5 = -3(x + 2) or y + 10 = -3(x – 3) b) Slope-Intercept ANSWER : y = -3x - 1 c) Standard ANSWER : 3x + y = -1