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Which coordinate plane shows the graph of f(x)=2x+3?

Which coordinate plane shows the graph of f(x)=2x+3?-example-1

1 Answer

5 votes

Answer:

NOT the graph A and the graph B.

Explanation:

y = mx + b

m - slope

b - y-integer

If m > 0 then the function is increasing.

if m < 0 then the function is decreasing.

We have y = -2x + 3

m = -2 < 0 the function is decreasing

b = 3 y-intercept = 3

The x-intercept: y = 0. Substitute

0 = -2x + 3 add 2x to both sides

2x = 3 divide both sides by 2

x = 1.5

Therefore your answer is C or D (look at the picture)

Which coordinate plane shows the graph of f(x)=2x+3?-example-1
User RoachLord
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