Find a vector a that points along the line. (b) Find the projections of the standard basis vectors e1=(1,0) and e2=(0,1) onto a. (c) Use part (b) to find the matrix of the transformation that projects any vector onto the line.

Harry owes the bank money. to repay his debt, he paid $150 back to the bank each month. after 10 months, his remaining debt was $6900. what was the original amount of harry's debt? how long did it take harry to pay back his entire debt?