.8 triangles to 6 rectangles

An apartment has a replacement cost of $950,000 and contents valued at $1,450,000. it has a classification of a and a territory rating of 3. find the annual premium a) $10,185 b) $9,230 c) $3,155 d) $13,830

What is the equation of this graphed line? enter your answer in slope-intercept form in the box.

Can someone check if i did this correct. it’s number 4 if you’re wondering.