What type of pattern exists in the data?

The time series plot shows an upward linear trend.

The time series plot shows an exponential trend.

The time series plot shows a quadratic trend.

The time series plot shows a downward linear trend.

$($b$)$ Develop the linear trend equation for this time series to forecast expense percentage.

$($c$)$ Forecast the percentage of administrative expenses for year B$.$

$\%$

$($d$)$ If SCF can maintain their current trend in reducing administrative expenses, during which period will they first achieve a level of $5\%$ or less?

Expenses will first reach a level of $5\%$ or less in period