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Fill in the table using this function rule.
y=-4x+3
X
-2
0
2
4

Fill in the table using this function rule. y=-4x+3 X -2 0 2 4-example-1
User Pamelloes
by
8.1k points

1 Answer

7 votes

Answer:

y = {11, 3, -5, -13}

Explanation:

You want the value of y for various values of x, given that y = -4x +3.

Function evaluation

Put the value of x where x is in the function rule and do the arithmetic.

y = -4x +3

y = (-4)(-2) +3 = 8 +3 = 11 . . . . for x = -2

y = (-4)(0) +3 = 0 +3 = 3 . . . . for x = 0

y = (-4)(2) +3 = -8 +3 = -5 . . . . for x = 2

y = (-4)(4) +3 = -16 +3 = -13 . . . . for x = 4

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Additional comment

You will notice that the change in y is -4 times the change in x. This means each increase of 2 in the value of x will result in a decrease of 8 in the value of y. Realizing this, you only need to subtract 8 from the previous y-value to get the next one.

Fill in the table using this function rule. y=-4x+3 X -2 0 2 4-example-1
User Benjamin Gale
by
8.2k points

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