What is the slope of the line through the data points in the table below?

Gh bisects fgi. find the measure of hgi •15° •21° •10° •8°

Can someone explain to me how to do

Long division setup showing an incomplete calculation. 12 is in the divisor, 6839 is in the dividend, and 5 hundreds and 6 tens is written in the quotient. 6000 is subtracted from 6839 to give 839. an unknown value represented by a box is being subtracted from 839. what number should be placed in the box to complete the division calculation?