Which statement describes the mapping? 3
7
F The mapping represents y as a function of x, because each yviue corresponds to y
one x-value
G The mapping does not represent y as a function of 2, because two of the rive
correspond to the same y-value
# The mapping represents y as a function of x, because each x-value corresponds to exacy
one y-value
3 The mapping does not represent y as a function of x, because there are more values
than different corresponding y-values.

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?