hey ya’ll im stuck on these 3 algebra questions i dont understand them 100% and i need some help so if you can please help me. 10points plus best answer. thanks so much
it says to write an equation for the direct variation that includes the given point.
(7, -2)
y = -2/7 x
y = 7x x
y = x – 9
y = 2x – 16
(-3, -6)
y = -2x
y = 2x
y = x – 3
y = 1/3 x – 5
(-4, -5)
y = x
y = 2x + 3
y = x – 1
y = 5/4 x
(Note: all the possible answers that look like this 1/7 are fractions)
direct variation: y varies directly as x, or y is directly proportional to x, if there is a non-zero constant k (meaning k cannot equal zero) y=k times x, so in your 3rd problem i’m guessing that you use your points, (x,y) which are (-4, -5) -4 is x and y is -5. so the first part would be y=x, which is the same as saying y=whatever x equals, so y= -4
in the 2nd part y=2 times whatever x is (-4) then add 3, so y= -5,
part 3: y=x -1 would be: y= -4 -1 which is -5
y= 5/4x so you multiply 5/4 times x which would equal 5 times 5 all over 4 which equal 20/4 then divide y=5
i’m not sure if i’m doing this right.
hope this helps, i’m not quite sure what you’re really asking for.