Complete the following sentence:
You can verify the zeros of the function y=x^2 +x - 7 by using a graph and finding where the graph _______.
A. is at a minimum
B. is at a maximum
C. crosses the x-axis
D. crosses the y-axis

Question

Complete the following sentence:
You can verify the zeros of the function y=x^2 +x - 7 by using a graph and finding where the graph _______.
A. is at a minimum 	
B. is at a maximum 	
C. crosses the x-axis 	
D. crosses the y-axis

anonymous · Answer

The zeroes occur where the graph intersects the x-axis. Because if you plug those x-values into the equation, y will equal 0.

campbell_st · Answer

graphically, the zeros are the x-intercepts.

anonymous · Answer

@qpHalcy0n, @campbell_st  would the answer be B or C?

anonymous · Answer

Well, if you look at it, it's a parabola that opens up (the quadratic term is positive). The vertex is at -7 (y = -7 when x = 0). So, where do you think the zeroes will be?

anonymous · Answer

Same as before, your zeroes will be where the graph crosses the x-axis. Given the information, it will cross at two points.

campbell_st · Answer

x-intercepts and which the curve cuts the x axis

anonymous · Answer

Im confused and not understanding

jwheele1 · Answer

C. crosses the x-axis

campbell_st · Answer

any point on the x-axis has a y value of zero. 

So the question is asking for what values of x make y = 0.... commonly called the zeros or roots of the equation... 

to find then algebraically you set y = 0 and solve 

so in your question you have 

0 = x^2 + x - 7

but you are asked about the graphical solutions. |dw:1348618852650:dw|