College Algebra

Evaluate the function f(x) = x + 8x - 8 at the given values of the independent variable and simplify. a. f( -6) b. f(x+2) c. f(-x) 2 Evaluate the function at the given values of the independent variable and simplify. 5x f ( x ) = (a) f(4) (b) f(-4) (c) f(-x) Graph the given functions, f and g, in the same rectangular coordinate system. Then describe how the graph of g is related to the graph of f. w f(x) = x g(x) = x-2 S Use the graph to determine the following. a. the function's domain b. the function's range c. the x-intercepts, if any d. the y-intercept, if any e. the function value f( - 2) The functions f(x) = - 2.9x + 287 and Chances of 60-Year-Olds Surviving to Various Ages VI g(x) =0.01x- 5.1x + 375 model the chance, as a percent, that a 60-year-old will survive to age x. The 86 bar graph to the right shows the chances of 90 75- 60-year-olds surviving to various ages. 60- 57 Chance of survival a. Find and interpret f(70). 45- b. Find and interpret g(70). 30- 25 c. Which function serves as a better model for the 15- 3.7 chance of surviving to age 70? 70 80 90 100 Age