Q. The parabola y=x2 is reflected across the x-axis and then scaled vertically by a factor of 5 .What is the equation of the new parabola?y=□
Reflecting the parabola: Reflecting the parabola y=x2 across the x-axis means we need to multiply the y-values by −1. This reflection changes the sign of the y-values, turning the parabola upside down.
New equation after reflection: The equation of the parabola after reflection across the x-axis is y=−x2.
Scaling vertically by a factor: Scaling the parabola vertically by a factor of 5 means we need to multiply the y-values by 5. This scaling stretches or compresses the parabola in the vertical direction.
New equation after vertical scaling: The equation of the parabola after scaling vertically by a factor of 5 is y=5(−x2). We can simplify this by distributing the 5 into the parentheses.
Final equation: The final equation of the new parabola is y=−5x2.