Question

Which of the following equations has this graph?

Answer

y = -1/2 x + 3

y = -2x +3

y = 3x - 2

y = 1/2x - 3

Answer 1

very confused

Answer 2

The first thing you can tell it is either A or B because since the slope is

And the slope for both
y = -1/2 x + 3
y = -2x +3
Is negative

Answer 3

First of all, the graph is decreasing, so the value that multiplies x have to be negative. f(0) = 3. You now can have the two first functions. But the root of the equation is 6. So, it's the first equation: -1/2x + 3.

Answer 4

y=mx+c

m is the slope

Answer 5

okay so once you have m what do you do Im still lost

Answer 6

Just use a coordinate from the graph, example (0,3) and (6,0)
Find the slope, then use the point slope formula.

Answer 7

Slope formula is
\[Slope=\frac{y_2-y_1}{x_2-x_1}\]
Substitute and find slope

You should get -1/2, then you'll know it's
y = -1/2 x + 3

Answer 8

thanks