Is change in math always represented as a positive number even when its negative?
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Answer:
An equation in the slope-intercept form is:
Step-by-step explanation:
The slope-intercept form of the line equation
y = mx+b
where m is the rate of change or slope and b is the y-intercept
Given
- Let x represent the time in months
- Let y represent the amount of money remaining in the account.
Given that every month Monica withdraws $15 from this account for her contact lenses
- so, the rate of change or slope = m = 15
Given that after 3 months she has $255 left in her account.
i.e. (3, 255)
substituting ,
and
in the slope-intercept form to determine the y-intercept
switch sides
Thus, the y-intercept b = 210
Now, substituting and
in the slope-intercept form of the line equation
Hence, an equation in the slope-intercept form is: