Using the function f(x) = 3x – 5, what would the output be for an input of 4?
2 answers:
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Answer:
Step-by-step explanation:
Notice that the answers they give you to choose from are all lines in slope y-intercept form, it would be very simple to just find the answer finding yourself the slope and y-intercept of the line in question.
Since they give you two points and
for the line, use them to find the slope of the line that goes through them, with the formula:
Therefore, the slope of the line must be
Now, find the y-intercept (b) using the general form of a line with the given slope:
Use one of the given coordinate points to request that the line passes through it. For example, through the point (-3,6) (when x = -3, y must be 6):
then the y-intercept must be 5. Therefore our line is : which appears listed as your second choice.