So your function rule would be as follows:
(-4,-3), (-2,0), (0,3)
Now use the formula to get the slope
m = (y2-y1)/(x2-x1)
(-4,-3) and (-2,0)
m = (0-(-3))/(-2-(-4))
so this gives you
y = 1.5x +b
x = 1
1.5 = 1.5 (1) = b
1.5 = 1.5 +b
b = 0
so your function is
All I need is a function rule. For example, y= 1/2x + -1
Each increase in x by +2 causes y to increase by +3. Therefore the function is a straight line of the form
y = mx = b and the slope is m = 1.5. Yopu still need to determine the constant term, b.
Use any point such as (x=0, y=3) to get b.
3 = 1.5*0 + b
b = 3
y = 1.5 x + 3
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