Write the equation for the following relation. a={(x, y): (1,2), (2,5), (3,}

y = 3x - 1

Step-by-step explanation:

Given the data set: (1, 2) (2, 5) and (3, 8), you first need to look for a constant difference in the values of x and y:

x: 1   2   3  (add '1' each time)

y: 2  5  8  (add '3' each time)

Rate of change (slope) can be found by dividing y/x:

3/1  = 3

Since y = 2 when x = 1, then y = -1 when x = 0.  

Using slope-intercept formula: y mx + b

y = 3x - 1

-13

step-by-step explanation:

f(x)=2x-5 for f(-4)

f(-4)   means let x=-4

f(-4) = 2(-4) -5

f(-4) =-8-5

      = -13

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step-by-step explanation: