Which value if a in the exponential function below would cause the function to shrink

Which is the equation of an ellipse with directrices at x = ±4 and foci at (2, 0) and (−2, 0)?

Consider the system: y = 3x + 5 y = ax + b what values for a and b make the system inconsistent? what values for a and b make the system consistent and dependent? explain

Write the fraction 9/50 as a decimal if needed round to the nearest hundredth