What is the effect on the graph of the parent function f(x) = x when f(x) is replaced with f(x - 7)?

a. shifts the line 7 units up
b. shifts the line 7 units down
c. increases the slope of the line by a factor of 7
d. decreases the slope of the line by a factor of 7

Acentral angle measuring 160 degrees intercepts an arc in a circle whose radius is 4. what is the length of the arc the circle formed by this central angle? round the length of the arc to the nearest hundredth of a unit. a) 4.19 units b) 6.28 units c) 12.57 units d) 12.57 square units