increases from $50,000 to $60,000, and as a result, its consumption increases from $45,000 to $51,000, then what is the slope of its savings function?…

If a household’s income increases from $50,000 to $60,000, and as a result, its consumption increases from $45,000 to $51,000, then what is the slope of its savings function? (Assume no taxes.)

0.6

0.15

0.85

0.4