Question

Your teacher asked your class to describe a real world situation in which a intercept is 50 and the slope is -10. Your partner gave the followingdescription: My friend started with $50 and earned $10 every week from dding chores. What mistake did your partner make?2

Answer 1

The equation of a line can be written as:

y = mx + b

Where m is the slope and b is the y-intercept.

For the word problem, the slope is -10 and the intercept is 50, thus the equation is:

y = -10x + 50

If x is the number of weeks, then y decreases by 10 when x increases by 1. We expect that the value of y goes from 50 down to 40, 30, 20, etc.

The example of the friend is that he started with