The front of the speaker is similar to the front of a speaker in a photo. What is the area of the front of the speaker?

The pyramid below was dissected by a horizontal plane which shape describes the pyramid horizontal cross section

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?

What are linear equations? could'ya explain too me, ? ! and how do you see what graph is a proportional relationship?