The monthly rent for an 800 square foot office is $975. For an 1100 square foot office, the rent is $1125. Write and solve a linear equation to find the monthly rent for a 1500 square foot office.

For 300 more square feet the rent is $150 more.

Rent per additional square foot is 150/300 or 0.50.

For an additional 400 square feet the rent is an additional 400 (0.50) or $200.

The rent for 1500 feet squared office is $1325.