How to write slope intercept form of y = -5/4 (x+4)
1 answer:
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Multiply the equation:
The solution set is the same, because multiplying both sides of an equation by a non-zero number doesn't change the solution set. In fact, if you rewrite the equation as
Multiplying this by 3 (or whatever number, for all it matters) gives
Now, a product is zero if and only if at least one of the factor is zero. So, either or
Since the first is clearly impossible, the second one must be true, which is the original equation.
Answer:
Part a) Ernest's calculation was correct
Part b) Ernest's calculation was correct
Step-by-step explanation:
The picture of the question in the attached figure
<u><em>The complete question is</em></u>
Ernest calculated the slope of the graph during the uphill climb to be 10. His work is shown below.
Points: (60.900). (15, 450)
Slope : 900-450/60-15=450/45=10
Part a) Determine whether his calculation was correct or incorrect, and then explain why.
Part b) Confirm or disprove Ernest's work by selecting two different points and applying the slope formula. be sure to identify the points you chose
Part a)
we know that
The formula to calculate the slope between two points is equal to
we have the points
A(60,900),B(15,450)
Remember that
step 1
Find
substitute in the formula
step 2
Find
substitute in the formula
therefore
Ernest's calculation was correct, because
Part b) selecting two different points
we take the points
(0,300) and (50,800) -----> see the attached figure
substitute in the formula of slope
therefore
Ernest's calculation was correct
