To write the equation for the scenario in slope-intercept form, we can use the formula:
y = mx + b
where:
y represents the water level
x represents the number of days of no rain
m represents the slope
b represents the y-intercept
Given:
Water level after 3 days of no rain = 45 feet
Water level after 10 days of no rain = 10 feet
Initial water level before the drought = 60 feet
Step 1: Calculate the slope:
Slope = (change in water level) / (change in time)
Slope = (10 feet - 45 feet) / (10 days - 3 days)
Slope = -35 feet / 7 days
Slope = -5 feet/day
Step 2: Determine the y-intercept:
From the given information, we already calculated the y-intercept to be 75 feet.
Step 3: Write the equation in slope-intercept form:
y = mx + b
Substituting the slope and y-intercept:
y = -5x + 75
Therefore, the equation for the scenario in slope-intercept form is y = -5x + 75.