Find the equation of the line with slope 1/3 and y interception (0,-2)

What is the range? can’t seem to find it out

Bring the fraction a/a-4 to a denominator of 16-a^2

To prove that angle def = angle dgf by sas, what additional information is needed? def congruent to dgf dfe congruent to dfg de congruent to dg dg congruent to gf