The points plotted indicate the number of office buildings ($y$y-axis) in a city over time ($x$x-axis).
Which type of model would be appropriate for this data?
Linear
Exponential
Will the slope of the line in the linear model be positive or negative?
Positive
Negative
The plotted points represent the number of ice-cream sales ($y$y-axis) in a day for a given temperature ($x$x-axis).
The scatter plot below shows the altitude and average annual temperature of ten randomly selected locations on Earth.
The scatter plot below shows the amount of ambient oxygen in the air at various altitudes.