Which command displays the DHCP relay (helper) address configured on the router?

The show ip interface command is correct because it displays the IP address, status, and configured helper addresses (DHCP relay agents) for all interfaces on the router. This command provides detailed information about the IP configuration of each interface, including any ip helper-address commands applied. show ip interface brief is incorrect because it provides a concise summary of interfaces, including their IP address and status, but does not typically show the DHCP helper address. show ip dhcp bindings is incorrect because it displays the DHCP lease bindings (IP addresses assigned to clients) managed by the router acting as a DHCP server, not the helper address configured on an interface. show ip route is incorrect because it displays the routing table, which shows how the router forwards packets to different networks, but not DHCP helper addresses. show interface is incorrect because it provides hardware and layer 2 status information for interfaces, but does not display IP-specific configurations like helper addresses. show ip dhcp pool is incorrect because it displays the configuration details of DHCP address pools defined on the router, not helper addresses.