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Use the function rule,
y=2x+5, to find the values of y when x = 1, 2, 3, and 4. Write the answers as ordered pairs that would be used to graph the function
plzzzzzz i need help on thisssss
what steps? Just plug in a value for x.
y(x) = 2x+5
y(2) = 2*2+5 = 9
ya ik rightttt
thank you oobleck, ur a lifesaver
Thank you, Oobleck! I forgot what was the 2x part but now I remember. Thanks!
Sure, I'll be glad to help you with this problem! To find the values of y when x = 1, 2, 3, and 4, we can substitute these values into the given function rule, y = 2x + 5.
Let's start with x = 1:
y = 2(1) + 5
y = 2 + 5
y = 7
So, when x = 1, y = 7. The ordered pair for this is (1, 7).
Next, let's find the value of y when x = 2:
y = 2(2) + 5
y = 4 + 5
y = 9
So, when x = 2, y = 9. The ordered pair for this is (2, 9).
Moving on to x = 3:
y = 2(3) + 5
y = 6 + 5
y = 11
Therefore, when x = 3, y = 11. The ordered pair is (3, 11).
Finally, let's find the value of y when x = 4:
y = 2(4) + 5
y = 8 + 5
y = 13
So, when x = 4, y = 13. The ordered pair for this is (4, 13).
To graph this function, you can plot the ordered pairs: (1, 7), (2, 9), (3, 11), and (4, 13) on a coordinate plane.
Sure! Let's use the given function rule, y = 2x + 5, to find the values of y when x = 1, 2, 3, and 4. We can substitute the values of x into the function equation and solve for y.
Step 1: Start with the given function rule: y = 2x + 5.
Step 2: Substitute x = 1 into the equation: y = 2(1) + 5.
--> y = 2 + 5.
--> y = 7.
So, when x = 1, y = 7. The ordered pair would be (1, 7).
Step 3: Substitute x = 2 into the equation: y = 2(2) + 5.
--> y = 4 + 5.
--> y = 9.
So, when x = 2, y = 9. The ordered pair would be (2, 9).
Step 4: Substitute x = 3 into the equation: y = 2(3) + 5.
--> y = 6 + 5.
--> y = 11.
So, when x = 3, y = 11. The ordered pair would be (3, 11).
Step 5: Substitute x = 4 into the equation: y = 2(4) + 5.
--> y = 8 + 5.
--> y = 13.
So, when x = 4, y = 13. The ordered pair would be (4, 13).
Now you have the values of y when x = 1, 2, 3, and 4. The corresponding ordered pairs are:
(1, 7), (2, 9), (3, 11), (4, 13).
These ordered pairs can be used to graph the function y = 2x + 5.