Section 1.5 #6 Match Lines with formulas f(x) = 20 + 2x Graph B g(x) = 20 + 4x Graph A h(x) = 2x - 30 Graph C u(x) = 60 - x Graph D v(x) = 60 - 2x Graph E	Section 1.5 #8 Sketch y = 3 and x = 3
Section 1.5 #10 Perpendicular slopes from equations. Lines are perpendicular since slope of one, is the negative reciprocal of the other m1 = 4	Section 1.5 #15 Equation of a line given the equation of another and a point, P (6, 5) . (a) Equation of a line parallel to above and includes P. m = - 2/3 and point-slope equation is (b) Equation perpendicular to above and includes P. m = -(-3/2)= 1.5 and point-slope equation is (c) Graph the 3 equations
Section 1.5 #25 Cost for 3 companies - 3 Linear formulas: (a) (b) Graphs of each function (c) The slope is the charge for each miles and the y-intercept is the fixed cost for renting for a day. (d) Company A is cheapest if drive less than 150 miles, Company B is cheapest of drive between 150 and 350 miles, Company C is cheapest of drive more than 350 miles.	Section 1.5 #24 Compare 2 Linear Functions. Frigbox: Arctic Air: (a) They both equal the same value when (b) Values of both in 20 years: The values in 20 years are meaningless so model no longer apply.