Please help I will give a brianlist to the first person to answer

Look at the following graph of the given equation. determine whether the equation is a function. explain why or why not.

Titus works at a hotel. part of his job is to keep the complimentary pitcher of water at least half full and always with ice. when he starts his shift, the water level shows 4 gallons, or 128 cups of water. as the shift progresses, he records the level of the water every 10 minutes. after 2 hours, he uses a regression calculator to compute an equation for the decrease in water. his equation is w –0.414t + 129.549, where t is the number of minutes and w is the level of water. according to the equation, after about how many minutes would the water level be less than or equal to 64 cups?

Mia’s gross pay is 2953 her deductions total 724.15 what percent if her gross pay is take-home pay