Bellringer
Bellringer Write and equation for each graph
5-5 Direct Variation
Direct Variation A function in the form ,where , is a direct variation. The constant of variation, , is the coefficient of . The variables and are said to vary directly with each other.
Is it direct variation? To discover this, just solve for y. Find the constant of variation
Is it direct variation? Try these please. Remember: To discover this, just solve for y. yes no no
Write the equation from a point Given point: (4, -3)
Write the equation from a point Your turn! Point (-3, -6) Point (12, -8)
Direct Variation Tables Use the ratio, , to tell whether y varies directly with x. Why? Since, k = If yes, then write the direct variation equation. x y -2 1 4 8 -4 -10 5
Assignment Page 264 Numbers: 2-28 even