Y=50x+20 what are the "x"and "y" intercepts for equation

Pls . yeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeet

If the diagram polygon abcd is a reflection across ef to make polygon a'b'c'd'.

Grandpa ernie is shrinking! over the past 4 years his height decreased by a total of 2.4 cm.it decreased by the same amount each year. what was the change in grandpa ernie's height each year