Please help, also explain I'm a bit confused.

Aright triangle has an area of 21 m2. the dimensions of the triangle are increased by a scale factor of 4. what is the area of the new triangle

Zahra runs a 500-meter race at a constant speed. which graph shows her distance from the finish line during the race?

Which represents the number of times all outcomes less than a given outcome occur? cumulative frequency relative frequency frequency cumulative relative frequency