You can either use the usual formula for the equation of a line when given two points 
Or we can make some more precise reasoning, specific to this case: the y intercept is 3. When a line is written as 
, the coefficient q is the y intercept. So, the second and third options are surely wrong.
Moreover, the slope m is the ratio between the difference bewteen the y coordinates and the x coordinates of two points on the line.
In our case, the two points differ by -1 units vertically, and 3 units horizontally. This implies that the slope is -1/3.
So, we have
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Answer:
I can't draw the graph for you here, but the y intercept is 3, and the slope is -1.
Step-by-step explanation:
First you plot a point on the y axis at 0,-3
Then you want to do a rise over run, doing -1,1 until you get enough points to graph the line.
Answer:
125$
Step-by-step explanation:
if it's proportional that means it will move up or down in equal amounts
going down from 20 to 5 kg means I divided by 4
so I can also divide 500 by 4 and get 125$
Answer:
Step-by-step explanation:
Notice that f(x) = ab would be a constant function, as 'x' does not appear on the right side. If 'a' were increased by 2, the magnitude of f(x) would be increased by a factor of 2. The domain of f(x) would not change; the range would be [a·(b+2)) (a single numeric value).
