A linear function plot is shown below. The plot represents a function of the form Y = mX + b where m represents the slope of the plot line and b represents the intercept. Determine m and b from the plot. If Y = 54.1, calculate the value of X and enter it in the box with one digit to the right of the decimal point.

The students at jefferson middle school are raising money for a charity by selling t-shirts and hats. the number of t-shirts sold was 3 times the number of hats. the profit was $5 for each t-shirt sold and $2.50 for each hat sold. the students raised $840 for the charity. they used the system below to analyze their success and found the solution to be (144, 48). 5x+2.50y=840 x=3y how much did they earn from t-shirt sales?