To find the slope of the line containing the pair of points, subtract y2 to y1 and divide x2-x1.
y2-y1
--------
x2-x1
Answer:
a) He substituted 0.8 instead of 0.08.
b) $264
Step-by-step explanation:
From the question, the principal is p= $275, the rate is r=0.08, and the time is t=12 years.
We substitute into the formula to get:


a) The mistake is that, he substituted 0.8 instead of 0.08.
b) The correct amount is $264