Use Linear Models to Solve Problems Practice Test

A school fundraiser tracks the total money collected with $y = 25x + 60$, where $y$ is dollars collected and $x$ is the number of boxes of cookies sold. How much money does the model predict will be collected if 8 boxes are sold?

A science class models the height of a plant with the linear equation $y = 1.5x + 20$, where $y$ is the plant’s height in centimeters and $x$ is the number of hours of sunlight per day. What does the slope $1.5$ mean in this situation?