Question

use the graph of the function f shown to answer parts (a)-(n). (a) find f(-21) and f(6) f(-21)=0 f(6)= - 3 (b) find f(18) and f(0) f(18)=3 f(0)= - 6 (c) is f(6) positive or negative? positive negative (d) is f(-6) positive or negative? negative

Explanation:

Step1: Analyze f(-21) from graph

Locate x = - 21 on x - axis, read y - value.

Step2: Analyze f(6) from graph

Locate x = 6 on x - axis, read y - value.

Step3: Analyze f(18) from graph

Locate x = 18 on x - axis, read y - value.

Step4: Analyze f(0) from graph

Locate x = 0 on x - axis, read y - value.

Step5: Determine sign of f(6)

Since f(6)= - 3, it's negative.

Step6: Determine sign of f(-6) (not shown in steps above but for completeness of problem)

Locate x=-6 on x - axis on graph, read y - value to determine sign.

Answer:

(a) f(-21) = 0, f(6)= - 3
(b) f(18)=3, f(0)= - 6
(c) Negative
(d) (No graph provided to determine f(-6) value and sign, but if following the process of reading from graph as above)