Number of Months Cost ($)
1 74
2 99
3 124
4 149
The table below shows the cost for a gym membership at the local fitness center with an initial start-up fee charged in the first month. Find the slope, or monthly cost.
$74
$25
$49
$37.25
To find the monthly cost (slope), we need to calculate the change in cost divided by the change in number of months.
The change in cost is $149 - $74 = $75.
The change in number of months is 4 - 1 = 3.
Slope = Change in cost / Change in number of months
Slope = $75 / 3
Slope = $25
Therefore, the slope or monthly cost is $25.