Use communicate property to write an expression equivalent to -5d+1/2

Is each relation a function? if so, state whether it is one-to-one or many-to-one. 3. (-4,7), (-3,5), (1,4), (3,-8), (5,-11) 4. (-4,8), (-2,4), (0,1), (2,4), (4,8) 5. (-2, 1), (-2,3), (0,-3), (1,4), (3,1)

Which point lies on a circle with a radius of 5 units and center at p(6, 1)?

Write numerical coefficient of y² in the expression 2x² - 15xy – 7y²