Answer:
C.
Step-by-step explanation:
linear equation:
y = mx + c
m = slope or gradient
c = y-intercept, the point at which the line meets the y-axis (vertical axis)
The y-intercept of y = 10 - 2.5x is equal to 10
**in the above equation, the slope and the y-intercept have been switched. The slope can be identified as it has an x beside it, so 10 is the y-intercept
Just looking at the equation we can already rule out B, D and E. So now it's up to A and C.
Next is the slope, we can see the slope/gradient is -2.5. It is a negative value which means the line must be sloping downwards. The line in graph C is sloping down (starts high on the left and as it moves the right goes down).
So answer C. is the graph of the equation y = 10 - 2.5x and there was no need for complicated maths!
