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beezybee98
 3 years ago
describe and correct the error in evaluating the function g(x)= 5x+3 when x=3
g(3)= 5(3)+3
3g=18
g= 6
beezybee98
 3 years ago
describe and correct the error in evaluating the function g(x)= 5x+3 when x=3 g(3)= 5(3)+3 3g=18 g= 6

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swissgirl
 3 years ago
Best ResponseYou've already chosen the best response.1Ok I tried explaining this to someone the other day but I wasn't that clear in explaining it. Its hard to explain this concept online but let me try again

swissgirl
 3 years ago
Best ResponseYou've already chosen the best response.1We are given the equation g(x)= 5x+3 This is the equation of the function g and g varies according to the value of x If g(x) was a constant such as g(x)=3 we would have a vertical line at y=3 but in our case our y keeps changing according to our x So when x=2 y=5(2)+3 y=10+3 y=7 Now when x=3 y=5(3)+3 y=15+3 y=18 So basically as you can see our yvalue keeps changing according to what our x equals So g(3) means what does g equal when our x equals 3

beezybee98
 3 years ago
Best ResponseYou've already chosen the best response.0wait i write all that?????

swissgirl
 3 years ago
Best ResponseYou've already chosen the best response.1nooo But do you understand what g(3) means?

swissgirl
 3 years ago
Best ResponseYou've already chosen the best response.1The error is that they multiplied g by 3 instead of treating it as "what does g equal when x=3" Then when x=3 g(3)=5(3)+3 g(3)=15+3 g(3)=18 So when x=3 then g=18

LogicalApple
 3 years ago
Best ResponseYou've already chosen the best response.1g(x) is a function, so g(3) means to evaluate g(x) using x = 3 as @swissgirl demonstrated.
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